Teambuilder Idea

While being a captain in Teambuilder, I came up with a idea because it was taking forever. Why not add a option where you can join a Teambuilder group with a friend. Im not talking about building the group. But lets say you want to be a bot support and a bot marksman, you could join a a teambuiler group of 3 with your friend and fill up the game and start playing. Know what im getting at?