Man...
I figured I would read/keep up with this thread so I could test these issues if/when I get a new phone. (Yes...I may get one) My wife and I are both out of contract and I have her interested in a 920 too. These issues are starting to concern me. I know this is a small sampling, but it is still concerning. She would be moving from an iphone 3gs and I would like the transition to be as smooth as possible. I hope she does not experience any of these issues. If it happens to me, fine, but I want her to have a great experience with WP.
A lot of these sound like FW updates can fix them. I do hope that Nokia or Microsoft acknowledge some of these soon (besides the camera) like they did with the 900.
I have a few concerns, but a big one is the exchange email. She has to use it for work, and it works flawlessly on her current phone. It goes right into her email app as a separate account. She has access to the global contacts and appointments sync directly to her phone's calendar. This is a must have. Otherwise this or any phone is useless to her.