New idea. Champion Elo

Same as the current elo system only you are assigned a champion elo based on your wins/losses at a given elo based on the champion after 3-5 games. Functions far better than the current "Mastery" system and lets players know when a player is dramatically better at one champion thn another or if for example they always win on fiddle sticks but lose on warwick in gold. The fiddle might be plat while the WW is silver. Gives you a better idea of what to expect in game. Especially if that's what is displayed.