A possible solution to leavers?

I was in a ranked game playing as Vi jungle when two of our team mates, both in bot lane, disconnected/rage quit. Obviously we lost. I'm incredibly irate that I was penalized for this loss when it wasn't under my control. No amount of warding or ganking or god tier plays can help you come back from a 3v5. I've though about a system that can detect players leaving early in the game and applies a loss prevented. Example: "Player leaves within 10 minutes of the game and does not reconnect. If the players team loses insert loss prevented." Or even reduce the amount of LP loss. I know you guys don't really care about us Low Elo players but can anything be done to help those of us who aren't completely terrible? Also on a positive side maybe add extra LP to someone if they do win a 4v3 or 3v5. I know people bitch about this a lot and I haven't really seen any solutions for this besides the archaic reporting system that doesn't help until after the fact. Banning someone after a game doesn't retrieve your LP.

Sorry for the wall of text