For me the character selection screen stutters but its because for some reason window isnt active and it uses some kind of background FPS limit automatically (I think its set up in the experimental version automatically).
What kind of glitches did you have?
Other than what I mentioned .. well.. I had setup very high quality and all kinda reshade's that now that I played in zerg, the FPS was struggling at 15-ish. So I might wanna put the highest-framerate settings on and reshade settings off just like u suggested before!