Although I posted this on the Adobe forum, I'll repeat it here:
So far I've tried the following things that I've had problems with before. Each one seems fixed:
1. Hanging on auto white balance.
2. "Three dot indicator." Much faster.
3. "Two-step undo problem." I always wondered if this was pilot error! Does not seem to happen any more.
4. Although I have no way to quantify this, it immediately seems much faster...