Actually it is pretty repetitive. You do the same key punching for every style. Now if there was a bit of variation such as using the anolog stick in a rotation while hitting the attack button which allows you to do a roundhouse kick, or something like that, would increase the interactivity of the game. As for the RPG side of things, it is very very very rules light and they could have easily made it completely hidden in the backgroun, making it a story driven action game, and along with the increase in combat control and interactivity made a better game.
Would it still be a CRPG? No, but I think the game overall would have been better for it.