Just getting the game to launch was annoying. First, there's the Ubisoft connect crap, which the game said it couldn't find half the time. I also kept getting "Failed to enumerate the DXGI adapter. Error code 1202". I was able to work around that by adding the launch option PROTON_USE_WINED3D11=1 %command%, but even then, large strips of textures were missing (simply rendering as flat gray).