I hate the way 343 treats DLC, it's so ****.
I think with the population low, they should make majority of playlists DLC required. Like what Halo 3 used to do; Have FFA, Infinite Slayer and small team objective as normal, so people can still get the core Halo matchmaking with buying DLC, but make the rest required.
I won't get anymore map packs after Halo 4, I really thought 343 learned from Reach, but looks like they haven't. They keep giving us 'DLC playlists' but no one wants that, we just want to be able to play them in normal types, like Big team and slayer. When they do a DLC playlist it only supports either 4-8 or 8-12.