Kasumi had alot of old DOA moves I loved, like I miss her old 66PK, the cartwheel was really pretty xD I also liked her DOA2U 66P2K more than her current 66PP tbh
Not really a lot, but I kinda noticed that there are moves in DOA3 that are not in DOA2U like Jann Lee's new KKK as well as his sidekick like his 66K or 6PK.
If that happened, (not that I wouldn't mind) it would've been DOA2/-3 Ultimate. It wouldn't make sense to add the moves that debut in 3, appear in an updated version of the prequel (although we have the intro of the 4-hold system and slopes).