I switched to Proton GE-9.0.7 and used Feral Gamemode, it's slightly better but FPS drops still happens in x-rays and intros
But they're not. Because they're nof fixed 30 either so they're not smooth mostly they ran on 8-15 FPS last few seconds they get to the FPS they suppose to.
My personel favs are : GTA VC, Hades and TLOU. I listen those OSTs for years and they still hit hard.