Match History Should Give You In-depth Champion Mastery Details

So I'm not sure if this is the right place to post this but its a concept for Match History so I suppose this isn't exactly the wrong place.

Anyways I think Match History should show you your end of the game Champion Mastery Score, what you did compared to other players that got you that score. This way you can understand where you went wrong and what you need to improve on to improve your score. I know Riot was afraid of implementing this kind of system because people would try to abuse it, but personally I believe if everyone is striving for an S or S+ and know how to do so, they will actually improve. It's hard to get an S or S+ and not have a positive effect on the game for your team, even if you are doing it for the score, the effort given to get an S will help your team in some way.

This also helps us with the new Hextech Crafting System, which is why I even bring this up.