Every now and then DoW will not play certain audio sounds, such as clicking on a building/unit and a short audio clip is supposed to play. However, I've played DoW on Windows 10 and it also has this issue from time-to-time. So, I'm just reporting this as I don't think it is a Linux issue, but rather a general bug in the game. The fix is to just start a new game (you don't need to restart the game client).

One of the games I tried playing had weird textures on the world environment. But, I just started a new game and it worked like a charm!