I read this entire thread, and no one mentioned one cool thing that is now fixed: how Opera used to popup the onscreen keyboard in text fields, even with when the real hardware keyboard was open. Now, the on-screen keyboard only pops up when the phone is closed. For me, that was a huge pain, and I'm thrilled.
Overall, I'm happy with the upgrade, and haven't had any problems. The fix for announcing callers over BT is big, too.