I Personally feel like every 10 bond scrolls, that we should be able to atleast pull any of the "starter" ninjas, like Kiba, Tenten, Shino, Naruto, Sasuke, Sakura, Ino, Shikamaru, and Choji. (Can't recall anymore)
It will help with the 5 stary-zation of many ninja's we don't use on a Daily basis.

It would be cool, maybe post this in the suggestions? :)