Either way, the map was designed to accommodate both MP and campaign. I remember when the Noble Map Pack came out and one of Tempest's designers said it felt so great to make an MP map without having to worry about campaign.
Don't get me wrong, I'm happy that the multiplayer maps in H4 are being designed purely for multiplayer, but there is still a big difference between "ripping them out of campaign" and designing a multiplayer space that can also be used as an asset in campaign. I don't really see how the on-disc maps in Reach were significantly negatively affected by their inclusion in campaign, aside from the fairly limited variety of locations and general shared aesthetics.
Looks like you double melee'd the wrong person too many times in 'that' battle canyon game!
I'm looking forward to the anti-Myyke effect.
My fists will find a way.......