AFK problem
Riot, you guys really need to address the AFK problem. It is extremely unfair to the team who permanently loses a teammate, and that kills all the fun. There must be a mechanism to prevent a 4 vs 5 situation from happening. AFK is just a waste of everyone's time.
E.g. if the system detects a player who went disconnected for more than 5 mins, the game has to be terminated immediately and players will enter into a new game.