K but i just think leaving it to random luck isn't really engaging. Also having a player have to start from scratch with a new character will make some people hold off on having a kekkei genkai. And it doesn't have to be story arches. It could be pvp tournaments. Can't really make a guide to give you the auto win in pvp. You are looking for a spot on replica of naruto I understand  but look at it from the player perspective. Only a few might luck up and get a kekkei genkai and the only way for you to get it is to join their clan? It would make the entire game revolve around those players that just got lucky and really did nothing for it. I am fine with it being random but at least make a prerequisite for it. Thank about it or not just trying to open some room for more options here.