Rito, This is how you reward Champion mastery and increase player's champion diversity

Theres the new key, box, and key fragment situation reward system right? Well how about you could give players a key fragment for each champion that reaches rank 4 and 5 of champion mastery(Or just rank 5)? Players will play different champions so that they could maximize their key fragments findings.

Done. People stop complaining about champion mastery not rewarding enough and this would increase the casual player's champion pool so we don't have to deal with the "Plz let me adc. I can't do any other role".