When a player of a team quits or is booted from a game, there is an option to have them substituted by an AI. However, the AI isn't good at teamwork and is often a foolish ally. I think the option to substitute for your partner, instead of the AI would make team games a lot more interesting and fair.

See https://warlight.uservoice.com/forums/77051-warlight-features/suggestions/1240763-teammate-takes-over-for-booted-surrendered-player.