Letter Performance Grade In Match History

I've noticed other discussions about this and thought I'd start a new one because I think it's a great idea. It would allow players to view their grades from game to game and see what they could do to improve by comparing the stats and know what areas to work on. With the introduction of Hextech crafting it would also allow them to get more chests and keys leading to more rewards for doing well. As this system grows and develops it can become extremely beneficial to the league community by giving players incentive to do well which improves everyone's experience and enjoyment while playing the game.