Will someone please explain to me why this hasn't been implemented? People keep bringing up "let the leaver bear all the elo loss for his/her team". Obviously this idea is extreme, and more importantly will not be implemented. However, just doubling someone's elo loss from 12 to 24 will GREATLY discourage leavers. This idea is so simple, and so practical. Just do it.
Edit: First post brought up the zero sum elo system. Lossing team members that didnt leave would lose 9 elo, I guess
Edit #2: Ok it's not zero sum. Who cares? DOUBLE THEIR ELO LOSS! Starting today!