Feeling wise, Sabre dance made into an oGCD ability as many have said before. Seems to be one of the few things that feels like it breaks the flow.

Improvisation always feels a little underwhelming and out of place. Not sure if the +% bonus healing would be better as an acquired buff you get for being in the field of affect rather than part of the channel, or something else.
The gain of Espirit feels a bit slow even with a full party beside you.

I really wish they would post what the % chance to gain Espirit is or something a bit more concrete. Feels like you gain it much faster under the effect under Technical vs Standard.

The single target weapon skills that change into dance skills should also apply to the AOE abilities. I am going to make a suggestion post about that one.

I wish Flourishing Fan Dance III had more weight to it other than another damage step, but hey, its a free oGCD AOE so can't complain too much on that one.