Game hangs almost always on first authenticiation to server or when creating a game. First authenticiation says Mit Battle net verbinden, Authentifiziert and then, on the final step, where loading characters it seems to fail. I tried it on different computers with ubuntu 14.04 x64 and newest crossover.
It seems, whenever the game fails to conect to battle net immediately , it does not try again and fail. All I could do is to kill the game processes and restart the game a few times, until it function. If it works, it works almost immediately, if not, it seem not matter how long I wait.
Same thing, if the creation process of a game does not finish immediately . Then I got a message, that the servers are full and I have to wait, for example for 2 seconds. But thats all. Nothing more happens.
Also there are problems if I try to change the difficulty, but I think for the same reasons as above.