

Reduced fps to 30
Game wont reach 60fps and suffers some little bits of slowdown
Game is playable but framerate not great, I limited to 30fps which it holds mostly but occassionaly dips a little below that.

Most likely will run fine, although the game seems to be fixed at 60 fps, and that can be a turn down for some.
The camera would do a spin (like you where spining a joystick around) if would move it quickly from side to side, could be a game problem and does not happen with the smooth camera option enabled.
I tried it with proton-experimental at first and the menu wouldnt load properly and the game would crash after a minute or two, i'm now running proton-GE and it worked fine for about 10 minutes with no crashes. It seems that using the zen kernel helps it.

multiplayer world generation doesn't work without disabling esync or alternatively using a kernel like xanmod or zen
run xanmod/zen Kernel to get multiplayer world generation working
game runs at around 40fps at 1440p on a 2080 Ti
I'd recommend running zen or xanmod instead of disabling esync since the latter will reduce the overall game performance

Game ran (on probably 1440p) at a 70+ FPS consistently
Resolution selection is weird, you can only pick between 720p, 1080p and unsupported which I'm guessing would be your native resolution