Hmm...I was thinking maybe more classes, but those classes need to have a more direct influence of what they are based on. Such as something melee based would have mostly melee abilities available. A healing class would be cool also. I have tons of other ideas, but most of them are ridiculous so I wont post em :P
More party members in the beginning so we have more flexibility with our team. Maybe choosing skills for our party members would be nice. I think controlling them would be asking for too much. I'm fine with not controlling them.
Bigger explosions, more animated cut-scenes (keeping the stylization the same) and better armours/character customization. But more oomph is a priority :3