Right now the act of sitting in 3v3 LFG locks you into that activity and you can’t really do too many other activities in the game. With how dead LFG is, you can be locked into doing only a limited portion of wow content for hours.
Instead of locking you into the activity of sitting in LFG and not being able to do anything else in game, there should be also an option to post an advert to look for a group, alongside from what is active now.
It stays up for 2 hours at which point you can refresh it or until you cancel it or log off.
People would be able to whisper you and you could coordinate a time to play later.
You would be able to do other activities such as solo shuffle, blitz or apply to groups for pve.