My lack of patience and frustration with beta 1 got to me and downgraded to 9 over the weekend. However I did not deregistered for the beta just in case I want to try future betas. The one most frustrating for me was audio output going from car to phone and vice versa when using android auto. I did report it so maybe it will get addressed in beta 3.
I haven't installed beta 2 yet, but I don't use Android Auto, so I wasn't aware of that issue.
I dislocated my knee over the weekend, and couldn't make up the three flights of stairs to my apartment, so I'm staying with my parents at their house. Their wifi is pretty slow, so downloading the new beta will take awhile. Plus i don't have access to my PC to fix anything if beta 2 is a dud.