Here's a little list of things I have noted over the past 12 hours:
1. I can't get the typeface color selector to work any more. (It just freezes.)
2. I can't get the "links" selector to work anymore. (It also freezes.)
3. There is no obvious way to edit the page-specific URL tag anymore
4. The entire system seems about 50% slower.
I'm not complaining (yet) but I get the strong impression that there was a significant lack of careful quality control review before the new dashboard was put in place. Upgrades are GOOD, but they need to work!