The only things I'm concerned about:
Engine tweaks: The engine is handling highjump-melee ('tiger knee'd') moves differently. A lot of the characters feel different to handle overall.
Sanae- Melee improved, bullet coverage improved as well. No longer bottom tier.
Yukari- 66C was downgraded a bit, and 623 was absolutely neutered. This is great, though, those two moves gave actual legit Yukari players terrible names.
Suika- 236B firepunch nerf, Giant Loli nerf, Loliball nerf, 2B nerf. Yesssss. I have waited for this day for so very long. Eat that, stupid easymodo drunken loli.
Meiling- 6A and 66A improved, several skills tweaked. 6A's new range improves her blockstrings.
Alice- So many random changes, all of them seem arbitrary.