Useless wavedashes FTW then!
I can't see the big problem by making it like that, or at least make it possible to set an amount of frames where you can't do anything. As good as the coders here are, that should be no problem. And really; the whole wavedash code is, as said, useless as it is now. No one's using it, because there are no tactical purposes for using it, and it's better not to.
They made the WD-sliding pretty much perfect, so "completing" the whole thing should be pretty easy for them.