Huh, surprising timing, I was just fiddling with this this morning.
There is an installer directly in the lutris website
I have found that you cannot connect to a raid. I get a 'run aborted' message when trying to scan in and when trying a practice run with my PMC I get 'Object reference not set to an instance of an object.'
Aside from that and hitching during new areas, it runs pretty well on my setup, going off the hideout and prayer models.
I suspect some tweaking is needed with protontricks and I think that ~~Battleye is also still the final hurdle for getting EFT fully working.~~ Battleye does have Linux support in theory apparently. Not sure what specifically is causing the errors.