Looks like the game does go fulscreen now, but non native resolutions are, off.. 
This is the file I wrote  The hud appears, but does not allow for fullscreen.
@Bitwolfies Does it change anything if you create a file called `dxvk.conf` next to the games exe and insert `d3d9.dpiAware = False` ? To verify that the game picks up the config you can also enable the dxvk hud through ...
Can confirm, the game appears to not be exposing that its fullscreen capable, supposedly this is also an issue on windows which is fixed by disabling high dpi display scaling, but there's no way to toggle that from wine.