It happens way too much that two identical lobbies are created (with same map and settings) and both of them take a long time to fill when if it would be just one it would be filled instantly. I would suggest making so you can't create two identical lobbies. For example you can't create two cp_Granary 6v6 lobbies at the same time, but you can create cp_granary 6v6 and cp_granary 9v9 at the same time. This rule should also exclude completely private matches.