I know its been said about the mastery system before but...
Stop punishing us for ending games very fast and not having the ability to afk farm as a jungler to get enough cs for a S+
Sincerely the 20/3 
>.<
3 Comments
Why do you think game time being short is relevant for getting a lower grade?
If you believe that cs is important for grading, wouldn't it make more sense that it'd be time based?