Thank you for the answer.
What about the upper limit of Quickmatch options available at any given time, can you comment on that? I've dug up some old screenshots of the Advanced Search menu to double-check and they do in fact show official servers running 8 different playlists at the time.
I can't add any new information to it. I'll volunteer that it's evidently not a technical limitation. It's a conscious design choice on our part that we're confident is correct and proper for the game.