Average wait time: Less than 5m.

[Canadane]

Sorry, I need to make sure I don't misrepresent you here. Are you saying that you think the duty finder wait queue is mostly fine as it is, but it would be helpful if it told you when it's waiting for more players?

You would be correct.
What I mentioned would alleviate your initial issues as well. Perhaps not alleviate the lack of players in a specific duty, but that's somewhat outside SE's control.