

By default, not all commands are mapped to the gamepad. Also, the UI cannot be navigated using the gamepad.
Best designed for mouse and keyboard.
Playing with the gamepad is supported, but requires tinkering to map many unmapped controls.
The menu is designed to be interacted with a mouse. Touchscreen kinda works, but the targets are too small and you cannot touch-drag to scroll, you have to touch-drag the thin scrollbar handle. So… Please use a mouse or emulate one.

it should work just like it does on windows, assuming that windows has a really unstable fps count on high graphical settings as well.
input lags a bit but like I said it could be because of the nature of the game itself
the fps is very unstable but it could be just because of the game itself and not linux
yeah uh when sending a message in the chat the last letter sometimes gets deleted for some reason
Game itself works just the way I remember native Windows
Spacing of text in item descriptions doesn't work correctly, so it ends up being messed up together with titles (some of them being also placeholder names). Hover popups don't detect window edges and disappear behind them. I think it was not an issue in native Windows.
You can totally live with any issues I experienced, they don't affect gameplay.