Run the game itself in safe mode. It's under the options tab when you log in. I was able to get in that way. It is a very big issue with latest version of DirectX and the game engine. I feel like this is probably a Cryptic/PWE problem, but whatever. Running it in safe mode kinda sucks, but at least you can then readjust…
Is that the bug that says something about the launcher not working and immediately disconnects you from the game? Because that's happening to me and I can't even make a thread about it.