[EDIT] Official MW3 Elite DLC Release Schedule:
March: Map, two missions
April: Two maps
May: Map, mission
June: Map, mission, mode
July: Two maps
August: Map, mission, mode
September: Map, mission
So, including the January maps that were just released, that adds up to twelve new multiplayer maps (as many as Black Ops), six new "missions" (which might be single player, co-op, or a mix of both), and two new gameplay modes. Seems like a nice amount of content.
I'm a huge fan of Call of Duty games--especially Black Ops--but I don't think I've ever been more frustrated by a COD title before MW3. MW2 came close, but the maps, spawn system, and the LAG in MW3 can be downright atrocious. Lately, I've been playing much more Battlefield 3. Although that title has its own set of issues, it never comes anywhere close to the frustration I feel from MW3.
The perk, weapons, and streak rewards in MW3 are darn near perfect, IMO. It just drives me crazy that they're are so many other problems with the game that ends up ruining a good thing. Even fixing the lag back to COD4 performance would be a HUGE benefit to the game.
Anyhow, I'm really hoping that the new COD Elite Premium maps will be able to help matters, at least a little. As of right now, the new maps are just several hours away from being released. I look forward to trying them out, and I'll post my thoughts once I've had the chance.