AFK players is really annoying problem. We all know that. So here is a nice way to solve this problem.
When a player left a game in our team and we lost system gave us temporary positive elo. Also gave the opponent team temporary negative elo.
So after that game when we start next one we match better team and have better chance to win game till that temporary elo will erase. Also oppenent team players match worse team and have less chance to win game till that temporary elo will erase.
If someone left a game in a group, all group members marked as AFK for this system. So can't take any temporary positive elo. This can be stop any impropriety usage.
Please share your oppinion and suggestion.
Have fun, good luck.