My reflexes might not be what they used to be these days. As I said, the second stage was kicking my ass on UV so I toned it down to HMP and was still struggling through the rest of it.. and Cultist Base after.
Speaking of Cultist Base.. that one was a pain even on HMP. The 'combat arenas' felt overly claustrophobic.. which wasn't fun when they were tossing Hell Knights, Revenants, Arachnotrons, and Mancubus at you all at the same time. I think a Whiplash or two as well. ..and that's not counting the Soldiers, Imps, and zombies.

And I know exactly what secret encounter you're talking about.. because it took me like 5 tries to do it... on HMP. I think I even lost a life or two there because that TINY area gets crammed quick. My ammo count wasn't fairing well either after like the second attempt. I decided to finish the stage and then fast traveled back to it to see if I could 'grind it out'.

That said.. the stage after that was a lot easier. The Doom Hunter Base or something. I only died once there, and it was because of an error on my part.. but I did get dropped pretty low a few times, so I'm not sure how it would have went on UV.
The platforming was getting a bit more annoying though.. with those falling coffin-like structures you have to cling to while scanning around for where to jump next. It became easier after getting the auto map, but before that... I felt kinda cheated once or twice.

I wasn't using my grenades nearly enough until I rebound it to something I'm more familiar with. Left ctrl or Mouse3 was alien to me.. so I switched it to Q, which was something I used for grenades back in my QWTF days. And go figure I used them more in the Doom Hunter Base. Swapping them, however.. I still have bound to the default G.. which is.. kind of ugly.. and as such, I often don't think to swap when one of them is on cooldown.

I sticky bomb weak points when I can with the aid of slo-mo.. since I don't have the sniper upgrade for the heavy cannon. Although, I kind of ignore the Revenant weak points.. he seems like a bit of a non-issue compaed to other demons, oddly enough. After knocking them off, I switch to micro-missiles, plasma, lock-on rockets, or full-auto shotgun.. though it's usually all four. If I find myself with 3 notches of chainsaw fuel, I'll take out a heavy regardless if I need ammo or not right at the start of a fight. 1 notch will recharge in the interim, which is enough for the fodder to restock ammo.
For plasma, I started with the microwave beam.. but I'm finding myself using the heat blast recently and liking it more.

Pinkies.. total non-issue. I forget where I read it in-game, but Blood Punch is an insta-kill on them, even from the front, so I've just been doing that instead of doing the whole 'ole' routine.
However, I think the next stage has a challenge to glory kill them 3 different ways.. so I'll have to temporarily depart from that strategy.

As for FOV.. yea, I'm on 90. It's weird, but I don't even consider I'm on widescreen. I'm just so used to it being '90' from the old days that seeing that number has me thinking it's correct, even when it's not.

EDIT: Honestly, what bugs me the most so far in the game isn't even the platforming (so far). It's the floating, neon weapons and keys. In 2016, they were more creative with those.. ripping them off corpses and such, or in the case of keys.. sometimes you took whole arms or torsos. Here in Eternal, the weapons and keys look fresh out of Q3 in how they float there and spin with a neon glow around them.

Answering the important questions: DooM plays DooM. I am happies. 

Haven't had the time to play the last few days, so my progress is still only at four stages complete.. and the one day I did have time, I opted to finish SS3:BFE instead because I was right at the end and put it off for like a month and a half. I'd have rather played Eternal, but I'm glad SS3 is over now.

Anyway.. the environments are gorgeous. The variation is also nice. In 2016 it was all tech bases on Mars and a few trips to Hell. Monsters are equally fantastic. Mancubus doesn't bother me as much in his classic style on my own PC as it did seeing him in videos.
My settings are all amped up as high as they can go except for... texture pool size, which is at Nightmare instead of UN. Not bad for a PC I bought like 5 years ago at this point. Only thing I upgraded on it was the video card, which is a GTX 1060. Haven't turned on the FPS counter to see what I get, but I haven't noticed any slowdown at all when playing. My monitor limits me to 1080p.. but whatever. Good enough for me.

The weapons all feel great... but honestly, I think the shotgun sound in 2016 was better than this new one. The full-auto mod is insane, but countered by the lack of ammo.. which I guess is understandable. Thing is though, despite having it for over a stage now.. I think I only used the SSG twice so far. And yea, I know that's probably not optimal with some sort of 'alpha rotation' or whatever that speedrunners used in 2016.. but the full-auto mod is fun for me.

Blood punch is great when I remember to use it.

Fast travel is truly fantastic for anal completionists like myself. ...however, it's also the same reason I haven't used the feature to replay a mission, cheat codes or not.
Ripatorium is interesting to just waste some time fighting monsters with no risk.. but it also works for helping to grind out a weapon mod. I noticed the mastery for micro-missiles got a few ticks the last time I was in the Ripatorium. Sadly, no Arachnotrons were there so I didn't get any for the sticky bombs.

I'm using the classic brown marine skin. I said in an earlier post they wanted you to buy games you already own, and not on Steam, to get classic variants saying it was a pita. Kinda forgot I already had a bethesda.net account for the SlayersClub.. and in early March all the old Doom games were on a dirt cheap sale pretty much across the entire internet, so I plunked down a dollar fifty for Doom2 from the bethesda store and got the brown marine. Had to load it up once through the bethesda launcher to link it, but after that everything was uninstalled/deleted. Eh.. feels worth it to me when a cutscene happens.. and when I look at the main menu.

That said.. I also like the cutscenes. For as much as 2016 liked to pretend it didn't push its story on you, you got locked in an area twice and couldn't do anything but listen to Samuel Hayden go on and on and on. The second of which was probably 5 minutes or more in his office. So far, there hasn't been any of that in Eternal.. and all of the cutscenes that did happen have been skippable for those who don't want to see them.

Opposite Pho.. the ice bomb is more my thing, and I've been spending points on that to improve it instead of the normal grenades. Always loved the classical element of water type stuff.. including ice.

Well right.. likewise, I use the flamethrower a lot too. Kinda have to for armor. But it's not the same level of joy as freezing a group of enemies solid with a well placed ice bomb.

I think it was a great game over all, i have a few gripes that i can easily live with but i just want to say for everyone, because i know we all feel this way its just the rest of your are too kind to say it, but the people responsible for the awful platforming need to have their dicks cut off and fed to them.

I felt like the way they limited the ammo was a cheap way to pad the difficulty, i get that they didn't want people to just use the same few weapons over and over, and that worked but there were a few times where i died because i ran out of ammo and there were no chainsawable enemies to replenish it. Thats just shitty design.

I've always felt that with the exception of classic doom games the weapons in ID shooters were poorly balanced particularly in the quake games. I played so many matches where people just used rocket launchers because of the ease of use while other weapons that were good but had a high skill requirement were more or less ignored.  I've been playing some of the original Unreal in the last month or so and i was amazed by how well balanced the weapons were, none of them were worthless and i never felt disadvantaged by having to use any of them, in classic UT multiplayer i never felt like i had to run in fear from any particular weapon. I thinking limiting the ammo in doom eternal was a mistake because the weapon balance was good enough that all the weapons were useful, you didn't actually have to force anyone to use them. I think anyone whos played a generations game with a slipgate rocket whore knows what I'm talking about. ( thats not a dig on the mod, i know thats how it worked in quake I )

Came across some issues with cheats and using mission select. I redid Super Gore Nest to do those secret encounters and had cheats enabled, right? When I went to the next mission, Arc Complex, I didn't think anything of it because I was progressing as normal and not redoing the mission... however, because I still had cheats turned on in the mission select hub the key for the slayer gate did not show up in my first run of the stage. I looked around for at least half an hour or so for the stupid key before giving in and looking it up online. I KNEW it had to be in that otherwise pointless area with seemingly nothing in it, and it should have been.. but wasn't.
So I had to redo part of the stage with cheats turned off to get the slayer gate. Annoying that it wasn't there the first time.

Then I went in again with all the cheats turned on to do a secret encounter. I had all the cheats on, including the weapon cheat I essentially collected in that very stage earlier. Figured I'd make use of the mobile turret for the chaingun since it was already mastered via the cheat and also had infinite ammo going. Finished and went back to the hub area... oddly still had the mobile turret mod equipped on the weapon. Instead of testing to see if it worked, I swapped back to the shield mod I actually owned... ...however, it kind of broke. Using alt-fire with the shield mod equipped did not produce a shield and instead acted like it wanted to use the mobile turret, which I don't think it did and just fired normally. Found that out when I paid a visit to the ripatorium.
Used some batteries to get myself the mobile turret mod and it fixed itself when I swapped mods a few times.. but yea..