It is really annoying to have people go AFK for extended periods of time while playing against AI. I think there should be a "/kick" command in the chat menu, where people can vote to kick players who are AFK, or committing other abuses like feeding the enemy team.

While this has little to no practical application in PvP, as losing a teammate in PvP will make the teams uneven regardless, in a game against AI, the game evens the teams out to 4v4 or 3v3, etc., when someone exits. The players should have the ability to vote on these issues in game.