I would rather not wait in a search lobby that is empty without being aware.
i have no clue if anyone is playing any competitive modes or searching the same game types as i am, so obviously this leads to needless waiting in a lobby that will never find another player. I remember halo 3 and reach had this on the 360 so you knew if it was worth queuing for specific game types. An active player count makes matchmaking so much better. I hope this feature is considered, it is necessary for successfully getting into multiplayer games.