I think what needs to be added most of all is a better story telling feature. The cutscenes and stuff were great but the story wasn't told enough. you actually had to know the anime itself to get the story. Less people would buy it because of that.
Rework the ougi system. All Storm is is a race to see who lands their ougi first. It's very annoying and unenjoyable gameplay. They take very chakra and deal alot of damage. In addition regaining the lost chakra takes maybe two seconds. Storm would be a MUCH more enjoyable game if the ultimate techniques weren't so * cheap.
Make support characters able to be turned off. No elaboration needed.
Going from Ultimate Ninja 3 to Ultimate Ninja Storm felt like downgrading, if only because of the lack of characters. Not only do Shippuden characters need to be added this time around to keep up with the PS2 series but also characters like Kurenai, Asuma, the Sound 4, Shizune, etc.
yeah ur right stroms rpg is better and have more modes but ultimate ninja has its own taste and it comming down from ultimate ninja 1 so now when strom is released i fell like i have been let down by bandai namco and not only me but all the naruto fans