i agree with you 100% on this, i had gave my own idea on how it should work
i do hope something like this is added since part of the charm of GMT was being able to que for a game and then being able to carry on decorating your suite or grinding for lobby achievements while waiting for someone to join,
currently the one main thing that makes me sad is wanting to play something like LC but no one will join and im stuck staring at a waiting screen for like 10 minutes to an hour when that type could be spent doing something else while waiting.