Mastery Points should directly correlate with your Grade
the points for mastery should be a direct reflect of the letter you get at the end of a match and weighted to be 50% higher if you win. This bullshit about getting only 100 per loss and 1500 a win is ridiculous.
For example it should go like this: S = 800 mastery A = 500 B = 400 And so on but if you win you get 50% more so winning is still a big factor So potentially you get 1200 for winning with an S rank...this way it's more in line with skill but the amount of points riot is handing out is about the same.