Persistent servers or stopping lobby disbanding & input based matchmaking

So, based on what you say here: "It's rare but sometimes we have more than four players that want to play together"  You are team stacking and that is just as bad because you are deliberately bringing in players you know and communicate with vs pubs. You just want an advantage. I would rather have it this way than let your group curb stomp a bunch of lobbies over and over again.