I have exactly the same feeling. I think I traded away MW2 once I realized I was enjoying BC2 much more and that it would take me ages to do all the spec ops missions.
I really enjoyed W@W online as compared to the single-player campaign, even though I felt Infinity Ward did a much better job in both editions of MW. We'll just have to wait and see!
I agree w/ you on BL:Tango Down. I might have bought it if it hadn't come out so close to Black Ops' release. That, and the online was pretty darn laggy. The 20-minute trial was just long enough for me to determine that "yep, this game sucks."