I really wish they'd tried something different with matchmaking in the MCC, it's pretty clear that playlists aren't ideal for a game of this size.
I think it would have been pretty cool if you just applied filters to the match making system, then the game matched you with people who have matching filters.
So say you want to play CE or 3, you'd be matched with anyone who has CE or 3 filtered. You could filter by gametype as well, so if you wanted to play only CTF but on any game you would match anyone who had CTF as one of their filters.
For those who didn't want to mess around with a bunch of options, you could have faux playlists which apply auto filters for you, however you'd still be matching with the entire population, not just those who selected that playlist.
Obviously this probably wouldn't work considering it's the MCC I'm talking about, but I think it would have been a better system. You'd be guaranteed to play what you want. I'd imagine it would be faster as well because you'd have a greater pool of people to match with unless you were extremely specific.
Edit: damn, Beyond is a salty, salty place.