Ranked and afk

I have a small suggestion for all ranked players, if a player leaves the game, would it not be awesome if RIOT did so that the rest of the team didnt lose lp, its really not deserved, I had a game now (really awesome one too) where we littarly would have won if we where 5, but since our GP left (rage quit after 3 deaths 5 min in game), we lost it by a few inches... And by that I mean, we where hitting nexus when Darius back doored us, if GP hadnt left, we would have someone to deff our base, so we would have won...