For 8v8? No. There's no point in shooting queue times in the foot for the sake of making a limp attempt at purging new players, especially in the game mode that isn't even intended to be taken seriously. There isn't even role requirements anymore, so why bother with something like this? If you want a more serious playing field, then head over to ranked solo-queue. Any complaints you have about new players or people goofing off will be much more valid in that environment.