Champion Mastery
The current system of rating your champion mastery play is a little off, Just played a 7-3-13 game and lost, only got 200 champion mastery points. Opposing team had someone go 3-6-2 and get 1200 mastery points just because they won. That is saying Madlife is a bad thresh player because his top lane fed....it makes no sense the way it is scaled now. It should be based on your own score, objectives taken, and farm, winning should have a slight bonus but not something that drastic. This is CHAMPION mastery not crossing your fingers and hoping for a team member not to feed mastery.
To those who say "Well if you were a master at a champion you would be able to out-carry" that is not always the case. Take supports into account. Mid lane and top lane feed like crazy, but you have a 2-2-12 game with tons of wards placed, you landed skill shots etc but the opposing support goes 0-5-0 and gets more mastery points than you because his top/mid carried him.