Tbf they did a great job in Rebirth of making everyone worth using for the most part. I personally was using Cloud/Tifa/Red for this game throughout due to my playstyle, but in the Hard Mode stuff I have been mixing up my teams with crazy success. Yuffie plays so phenomenally in this game and her characterization is so much better.
The only one I'm not using is Cait Sith. Characterization much better but that one forced solo gameplay section with him turned me off on his gameplay.