Possible solution to AFK problem.
If a player on your team gets punished for trolling or afk-ing or whatever that resulted on your lost. Then you get a "lost forgiven token". The token will only be given out to the losing team who had a player punished.
Your next ranked lost will be counted as a lost forgiven for each token you have. I know it wont fix problems such as losing while 2/2 in promos.