Great game.

I often find myself playing 1 v 2 or 1 v 1 with open spots filled by bots. If its happening to me its assuredly happening in other parallel half fill games too.

After a match finishes ( not a single round, a match) and you are crap talking in the post match lobby, have the game attempt to merge 2 half filled games into one full lobby.

Perhaps make it a toggleable setting so you can vote to wait longer for match making, or proceed with half full group.

See online lobbies for games like mass effect andromeda for good examples.