I think it is useless to keep 10 rooms open and only use one.
This I think that you too have raised this problem, otherwise you would not have launched a vote a few days ago on the maximum number of players in the room.
In my humble opinion, the game must have rules that the player must accept and not vice versa
. So if I enter a room with 32 players, and there is no place to play, I automatically have to be sent back to another equivalent room along with other players to make a new match. Who does not want to play in another room (such as small room, or coop etc). With the excellent application that allows you to replay your own games as well as those of the strongest players, the in-room function of spectators, often afk, makes no sense.