If there is one thing that I would want IW to patch in with DLC, it would be saving of ALL challenges, not just the prestige challenges. Having to work on payback or killstreaks - air strike... - or perks exclusively is sorta lame when you realise that they get unlocked so late in one prestige. I mean, getting 750 (!!!) equipment destroyed with sitrep takes forever and it is the last perk to be unlocked. That doesn't really make sense.
Oh, and more challenges, allthough not of the crate dropping kind. Nobody gets those legit except the extremely lucky. But sticking semtex to a harrier is sort of within the realm of the possible.
Oh, and unglitch the Pavelow, please. If it's supposed to count towards the killstreak reward, make it work as it should. And why doesn't a Pavelow count as a helicopter, but the apache does? It makes no sense.