Well, you asked what's wrong with it, and being entirely unusable on a lot of the target hardware its trying to address sure seems like a problem. I didn't realize I needed to give them money to properly speak true statements.
I don't blame them, it's not like Apple makes it easy for them. They're definitely working hard on the project and I wish them luck. But one can't act like it's actually a viable OS to generally run on M series hardware. It kind of works on a select few models.
