Checked out the newest catalyst driver (or whatever they call it these days).
With previous driver (the DOOM optimized release) and shadows on high rather than ultra, in the big room just before you find the chainsaw (there's crates going by periodically on a conveyor here), the FPS hits 60+ on my R9 390X, but if one swishes the mouse around a bit it can drop to as low as 52. On ultra, it will go down to 40-something.
New driver - well over 60. Then I discovered there were some advanced settings that weren't at max; I whacked those up to full and lo - still 62 fps. Game stays at 60+ most of the time but tears a lot with vsynch set to adaptive. Well, at least it's fluid!
Not too fond with the fuzzy way the game handles ledge grabbing. Most of the time you grab a ledge, sometimes you don't - for seemingly no reason. Once, in one of the larger rooms in Resource Ops map I missed a grab and fell a hella distance (like 10-15 meters straight down), fortunately landed on solid ground and took no damage whatsoever. ¿Qué? lol...
THEN, after A Lot of jumping and swearing and squinting at the annoying automap with its shiny highlight that hides if you've explored a region or not if viewed from certain angles and distances, I fell down another hole while chasing an inaccessible area (with some ammo stashed strategically so you could see you can get there somehow) where there was no ground below and died. Then I respawned hella far away across the whole fucking map, because I had already used up all the autosave points. Fecksake, I hate HATE that stupid console autosave shit! That's why I play on a PC goddammit!
Quicksave or bust!! Not sure I feel like playing this game anymore, tbh.