This is just fromwatching the Youtube videos, since i don;t have a Wii at the moment.
I don't remember whether you ripped some animations from the game, but they still look fantastic. I love it when Ichigo's sword swings chain into each other so smoothly to create a non-stop swinging monstrosity.
To me, it seems Ichigo's Up-B Flash Step is a bit tame, and meant only for evasion (unless if that's the point). Maybe you could have it so that if you hold the B-Button, when Ichigo reappears, he either slams down or unleashes a G.Tenshou. Or maybe a control-stick half-tilt instead of a full tilt.
As for Getsuga Tenshou:
a) Are you using a boomerang/article? It might not be a bad idea to get someone from the KCMM community to vertex hack it into a more crescent shape.
b) The glow it leaves behind should technically be black...but how the heck does anyone make a black glow? Or maybe it shouldn't even exist, or if it does, be significantly shorter.
c) Getsuga Tenshou has a tendency to explode/expand once it hits someone. It's too bad we can't use multiple effects at once, otherwise I'd ask you test out what setting someone on fire and darkness looks like.
You may have already, but check out this live-action G.Tenshou. It might give you some ideas:
http://www.youtube.com/watch?v=ITtGGkNJn2U
Your project is my favorite one, and you've made so much progress for one person working on animations and PSA.