With this targeting system in all, i think this could be put into place pretty easy. But i was wondering if you could do one thing.
Jumping Attacks
Yesh, i said it. I wouldn;t mind iconning the base or more jutsu states for it at all. It basicly talks for itself, but you could make it so were you can fire certain jutsu in the air, such as housenka, or throw shuriken in the air. This would make taijutsu more important, considering you cant jump fast / far without high tai.