1 When displaying the text in the status bar for an opponent, the text appears to be double printed.
2 It's forgotten some places I've been to. The most egregious example was being told I'd discovered the Forlorn Cavern in Ironforge, the same Forlorn Cavern in which I'd spent many a happy hour fishing. (Unless this might be a case where they've created a new subzone ...)
Before I end up sounding like a broken record, I should say that there are definite improvements. The graphics seem to have been sharpened up, several icons are nicer, and the voice chat stuff appears to work better than previously (though that could just be me). If the bugs found (and with tens of millions of users, they will be found) are quickly fixed, I'd say it's generally positive (even if they have, as expected, nerfed Death Knights somewhat).