Reduced LP loss for when a teammate quits early

I don't think it's fair to lose 18 LP, or even a promo game for that matter, when a teammate quits early (pre 5-min). I for one have had this happen to me 3 times within the last 2 weeks, and it's quite unpleasant when you're trying to climb.

I wonder though, is there any way this could be abused in ranked if it were to be implemented?