Local (single-player testing) and online play both appear to be fully functional.
What does not
If the game loses focus, keyboard no longer allows you to move your character. (chatting via keyboard still works fine)
Using winecfg, select the "Emulate a virtual desktop" option and set the desktop size to the game dimensions.
What was not tested
Local LAN games
This is an update to https://appdb.winehq.org/objectManager.php?sClass=version&iId=39361, after applying the listed workaround.
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Current||Debian 10.x "Buster"||Oct 02 2020||5.17-staging||N/A||Yes||Yes||Gold||Jordan|
|Show||Debian 10.x "Buster"||Sep 27 2020||5.17-staging||N/A||Yes||No||Silver||Jordan|
|Show||Arch Linux x86_64||Sep 25 2020||5.17||N/A||Yes||Yes||Gold||Nonny Moose|
|Show||Manjaro Linux||Sep 16 2020||5.16||Yes||Yes||No||Silver||Summer|