Every other fighting game arcsys has developed so far works flawlessly on Linux. There are clearly different requirements that were probably pushed for development of this one.

Ironically, only Pixels are supported at the moment.

I got the same mail. Information regarding orders doesn't seem to be included, so I hope that as long you have not saved your address information (or deleted it after ordering), the damage is minimized to just your name, IPs, and email addresses.

I'm not experiencing OP's issues but I do notice that running natively makes cutscenes play at slower fps, which also desyncs with the audio. Cutscenes work perfectly fine when running it through proton, so that's at least a reason for me to use proton.