I just wanted to let some people know a little something I found out.
The new afmf2 preview driver did not work well for me, because the radeonsoftware.exe was very unstable and pretty much always crashing, like in past drivers(not all of them). So, I'm not sure what amd is always doing. But the guy responsible for the adrenalin software should maybe look for another job.
I replaced the radeonsoftware.exe with the one from the previous afmf2 preview driver and what do you know, it works and does not crash.
Of course that is only a temporary fix, but it clearly shows that amd keeps screwing things up.