I just uninstalled the Beta and upgraded to WS 12.01.
Here is why:
1. In all previous Betas I participated in I saw a constructive dialogue between testers and developers. This time I dont see anything like that.
2. the performance is horrible - I would accept a performance drop in the range of 50 - 100% due to the debugging binaries but a boot-time of a VM that has to be counted in hours instead of seconds is unacceptable for me.
I will consider reinstalling the beta if my open questions are answered.