Seems to directly go against the type of game you're trying to make. This isn't a story driven action game. It's a roleplaying game based on the realism of a ninja world I grasped.
Saying, "You were born in the leaf village so you physically cant use this weapon." seems weird to me. (This coming from someone that this update wont effect lol)
Edit: If you want diversity among villages it shouldn't come from items that anyone can pick up and learn how to use lmao. Maybe it should come from secret jutsu passed down by generations of families within the villages?
Blu,