I don't know if this is a giant troll post or if the new player actually needs help.

The reason nins like Neji aren't OP is because if you put a healer in your 4th position(that's going last in a round, meaning they are near the back of the team) then they will clear debuffs off of X number of your ninjas. Kabuto is a great example of this, as he clears a debuff from 2 ninja during his action. Sakura's Mystery clears all debuffs from your entire team, costs nothing, and is a prompt(it goes right away, and doesn't take the nin's action for the turn) as well.

Honestly if something looks overpowered, trry to figure out why it's beating you and see what you can do to counter it.