I can’t see any logical reason why, if Ady were too busy to do a purist story version someone else couldn’t do a more traditional cut using his elements (as long as due credit was given). I feel that way to some extent should TFA turn out to be good and Ady’s changes to ROTJ:R contradicted it. But I maintain I am more excited by the prospect of ROTJ and the PT being worked on than even seeing Ady finish ESB:R and that’s not to understate how exciting that day will be.
Ady should do his own thing though and all power to his many elbows.