Successful hits to enemy weak spots could recharge CC as much as the whole thing (within your min-max of course).
When I played last weekend, I realized how crazy this is. Late game, when you have a lot of CC, a FULL recovery is CRAZY. I was fighting an enemy at one point controlling Asbel and I went from 19 CC to 1 CC but my last hit gave me back a full 19 CC... crazy ass combo (then link that thing with a 75 hit free Mystic Art *drool*).
My big thing about Vesperia's battle system was Judith. Air combos are fun.
I actually played Vesperia with a friend. I was playing Yuri and my friend was Judith. He swears that it was awesome (I never really tried myself, it was his character).
One major thing Graces F did though is that playing a caster is fun. I played a bit of Rita and Estelle in Vesperia and it's just mind numbingly boring... and that's coming from the guy who prefers to play Rena over Claude in SO2.