1. Rounded glass is nice, although mine does seem to be lifting near the power button.
2. This was a silly decision IMHO. I'd have rather had a thicker device, however my leather Apple case makes this a non-problem.
3. If they'd left it at the top, people would complain that they can't naturally reach it. It's really easy to get used to and makes a lot of sense being on the side due to the size of the screen.