Ubuntu has had tons of issues beyond Unity like USB performance and much more. Unity was the final nail in the coffin for me. It's beyond awful. I can't believe nobody raised their hand and asked WTF are we doing?!?!?
Mark Shuttleworth is Canonical and has the right to unilaterally make a decision like that. Unfortunately, instead of taking the criticisms (constructive and otherwise) and learning from them, he is openly hostile to anyone that doesn't share his vision of Ubuntu.
It was a great ride (Ubuntu-er since 2006) but I'm off that train.