I remember there was a similar suggestion almost one year ago (
https://www.cubecraft.net/threads/lobbys-for-ranks.220153/).
I mostly agree with this comment on that thread:
I do not agree. It could split the community into 2 parts. People with a rank, and people without a rank. I do not see any advantage for anyone of having this implented.
This might give stone rankers the feeling that they are left out, because if there were ranked lobbies, all players with a rank would probably be in those lobbies instead of in the normal lobbies.
You can still have fun with friends and other ranked players in the current lobbies, there's no need to make separate lobbies.
As EasyWest said, lobby 1 is usually full of ranked players/active players, you can hang around there ^-^