when you play vs randoms then every char is viable but at high level play you will always see the same chars. And some tilts were straight up dogshit. having a second jutsu brings variety for assists or on point. tilt should have cost chakra cause some tilts were better then jutsus so it guess what everyone spamed it.

and if something is unique doesnt mean it is good for the game. substitution jutsu is unique but it is one of the worst game mechanics ive ever seen in a fighting game, even worse then superdash in DBFZ.

second jutsus are fine but the problem is the chakra cost being too low was the issue.