What about S- or above play = 1/2 off LP losses for that game?
It's really disappointing to have the game say "Wow! You played well!" and then because your teammates had a particularly rough time of it (i'm looking at you 2/12/9 Trynd top, or you 5/12/9 Jinx ADC :( ) you lose a bunch of LP..
Put simply.. It's really quite nuts to get a mastery 7 token in the same game as you get hit with a rank demotion
What if that wasn't the case? what if the game said.. you played well, you only get -11LP (50% off) for this one?
Now that individual play IS being evaluated, it's time to have that slightly contribute to the binary ranked reward/loss system