1. I like having a common location for things, but the Devices, Settings, and Share charms don't make it obvious that they're app-specific, especially when you have the top and bottom menu bars too. I didn't think the Mail app supported printing until I read that print functions are moved into the Devices charm.
2. I lost my right-click! Sometimes context-sensitive menus make sense, like in a word processing application. I undertand why it left though, as you can't really right-click with your finger.