Post game grade and LP.
My idea is a simple one. If you win and get a good grade you get more lp. If you lose and get a bad grade you lose more lp. Moreover, if you win a game but have a bad grade you get less lp and if you lose a game and get a good grade you lose less ip. Easy way to incentives people to focus on playing their champion better.
Why is this not a thing? [zombie-brand-mindblown]