Tthe hardest change for me to adapt?.....hard to say. I get used to stuff pretty quickly.
I think that now when you dodge in midair, you're capable of still hit and jump, instead of getting inactive until you hit the ground or die. I think getting used to that will tak ea few battles, because I'm so used to just waiting for them to hit the ground. I'll have to remember myself "Oh yeah I can still hit you!"
But the 'floatiness', as it has been mentioned, will be interesting also.
But it will all happend very quickly. It's not liek you need "training" for it.
And I really don't give an honest crap about advanced techniques not being there or not. Like wavedashing and such. Doing stuff that just isn't normal for the characters to be doing. Stuff that abuses the existing system for the advantage of the player. I find that unnatural for games of this style.