I don’t think they should change their design of multiplayer just for treaty players. Quick Search exists for ranked games. If they make lobby ranked, it will kill the purpose of quick search, and quick search will die like it did in the original. If quick search dies, finding games will become harder, not easier.
But currently, Quick Search is broken for treaty. I made a post about it here just minutes ago: TREATY quick search (Play a Ranked Game) is in a TERRIBLE state! Devs please intervene!
What they need to do is fix the Quick Search for treaty, which is in accordance with the design objective of multiplayer.