Different body builds to choose rather than just there being one body build.
Fun mini games that are often found in JRPG's, instead of betting on Chocobo's racing ( Final Fantasy 7 mini game) have their be a Sheep/Dragon? betting race and maybe something similar to Final Fantasy 8 card battle system (Triple Triad) which you could challenge people all sorts of places in the game with NPC's, it was a fun mini game system.
https://www.youtube.com/watch?v=IZJB-ylRWiI#t=688 Starts at 11:28. Maybe add places like Casinos as well and add bunch of mini games inside the casino. So yeah, more fun diversions in the game.
Possibly adding recruiting Summons as well? And even adding dialogue with them, would be fun to hear their thoughts on things including on some of the things you've done in the game.
Keep the co-op in your games as it is a big selling point.
