I've played it in January 2022 on PC (so about a year after release), going through a second playthrough on Steam Deck now.
Compared to two years ago, the game is not that different IMO. I enjoyed it immensely the first time, and I'm loving it enough now to just play it again. A lot of very noticeable changes with 2.0, with the entire perks system rebuilt and such. Not a major game changer IMHO but it's all good stuff.
As for Steam Deck, it's 100% compatible and looks great. I've noticed very few frame rate issues.
I wish people could let go of their resentment towards the game's launch woes, because this game is a genuine banger with an amazing setting, great gameplay, and a kickass story.
I played it a few months ago on my deck. It has default preset that holds an extremely solid (i think) 30 fps from my testing. Whatever the target was it held really well
So if you don't mind 30 FPS the default is pretty good.