I don't like the UI. First of all, I never used swipe up on my N9. The swipe from the right or left is effortless while the swipe from the bottom requires you to bend your thumb as if you'd want to hit a button. In fact hitting a central touch sensitive control button is easier.

Apart from that I don't think I can live without widgets AND without an event/notification screen. Unfortunately Sailfish has the same problem.