Automated gameplay improvement feedback to players
I'm imagining a system where, at the end of a game, it would automatically give you some feedback about where you can improve next game. For example "ward more", "farm more", "gank more", etc. I think it would be easy to do considering they already have created Champion Mastery scores. For example, if you get a B+ on Ashe, the system would compare you to people who got an A- on Ashe, and would figure out where you fell short. Then it would relay that information to you.