It's absolutely terrible this happened in the first place, and there's no defending what they did, accident or not.
However, now we have to see what we're left with.
Some angry users that lost $10 or $5 due to an error and piss poor communication but also a large population that now has the maps.
Me and Steely were playing in BTB last night and every game we had DLC in the voting options (and yet Ragnarock was still voted, lol) I'm not sure if they made their DLC search algorithms amazing, or if it really is a large population that now has the maps.
Either way, it would suck to lose that. They don't want to restrict access to playlists with a paywall like they did in Halo 3. They HOPEFULLY learned the lesson from Reach DLC where it will almost never show up in matchmaking so we essentially wasted money on maps we would almost never play.... and a singular DLC playlist is kind of obnoxious as well since you're buying maps to play in ONE playlist.
Making the maps more accesible is the best for the consumer. But at the end of the day, developers need to get paid. Now, I'm not sure if the cost of making multiplayer environments went up or something, but if they can make decent profits with the Halo 2 model of DLC of pay for early access, will become free in like 2-3 months (or less) then that is by far the best model to use.