Mastery score at /ff

I've noticed that if a game is forfeited by the enemy team, there are rarely any score of the rate S- or higher distributed. I think this is a major flaw in the algorythm, as you played so well that the enemy didnt see any chance of recovory. There are ofc alot of other flaws with the algorythm, for example playstyles is not takes into consideration. If i want an S on Lee Sin, i have to be greedy, and take all the kills i can. Even if it will benifit my team even more if those were assissts.

I hope you already know of these things, and are working on a solution.