[Idea] Using Champion Grades To Determine LP Gain/Loss Per Match

Okay so hear me out. We already have a system in place that can judge performance of players, as slightly flawed as it may be at this point, so why not use this to help determine LP gains and losses in ranked. For example say someone gets an "S+" but his teams only gets "C"s and they lose, maybe that S+ player could get a smaller LP penalty for losing as his team was either not as skilled as him or they were not trying as hard to win. Now another example is the opposite, say someone ques up with their friends who are higher mmr than them, if their friends all get A-S grads and they get a C they would get less LP for the win because they either did not play well or are not skilled enough for that mmr.

Anyhow just my thoughts on how we could incorporate the grading system into ranked. Let me know what you think. (PS: Please don't downvote unless you truely think this is a worthless waste of time.)