Just adding my reason for wanting to roll back: I am constantly getting the Mac pinwheel while Evernote is working and I'm taking notes. I turned off auto-sync, which I had initially suspected because the client site I work at has weak WiFi. I take notes during meetings (like a lot of folks)... I can't afford for the pinwheel to show for 30-45 seconds every few minutes. I actually do like the new UI, but it did take some time to get used to it. Only think I don't like is that it's an extra click to select a notebook.