The game would be a lot worse if they removed the ability to queue in as a premade. Even if it prevents people from pub stomping entire lobbies, you also remove the ability for anyone who just wants to play with any of their friends at all. Which I can say with absolute confidence that the latter is a far more numerous demographic than the former. It's a very silly idea to say that we shouldn't allow people the ability to play with their friends in a multiplayer game.