Xianghua will probably end up around mid tier. She got pretty nerfed in this one, but I'm glad Amy is still as good, if not better than her SC3 AE version. Amy's likely going to end up top since she has a lot of mix ups, safe moves (eg. 33B), and auto-parry stances. On the other hand, Apprentice's main draw back is his lack of low attacks which is one similarity he holds with Hilde who has few lows and hardly any tracking moves. Too bad, too, I had high hopes for Hilde.
Here's something I hope they fix. At least it'll be banned in tourneys.
http://www.youtube.com/watch?v=FOgyWAeqjsk