The fact that the AI takes over for a human player who gets dropped in a multiplayer game is a very cool feature, but what level of AI is it? Easy/Medium/Hard?
It might be interesting for the game to pick an intelligence level to help autobalance the teams. For example, if team A is beating the heck out of team B, and a team A player drops, then stick them with an idiot AI to help even things out

Or likewise, if the losing team drops a player then give them a genius AI replacement to assist.
Just a suggestion. Might make things more interesting than just using a Medium or randomized AI for every dropped player. Dunno how AI personalities would work in with this, but difficulty level seems like a good candidate for adjustment to attempt in evening the playing field.