Flawless widescreen has an fps uncap option as well as letting the game fully support ultra wide. (The game is fucking stupid and renders in ultra wide anyway and then just puts black bars to force 16:9) You of course have to play without online features because you can’t use anti cheat at the same time.
So far I haven’t noticed any mechanics changing, but I might be missing something? It miiiiight mess up stuff like parry timing, but I don’t think it does.