Game runs smoother than it did in the previous major update, even in menus. It does require turning off terrain tessellation via editing TKGRAPHICSSETTINGS.MXML in a text editor to prevent a crash when loading into a save on AMD. To do this, find the "TerrainTessellation" property, remove the trailing slash, add another Property tag below it with name="GraphicDetail" and value="Low". Then close both property tags and save the file. No other tweaks were necessary for me. Oh, and as of the time of this writing, keyboard controls can't be remapped, but that's a bug in the game, not a Proton issue.