Yeah, the online play was much more intense in MW2 (for me anyway). The secondary weapons on Black Ops are non-existant, but the wager matches and zombies are really fun to play, and having dedicated servers is always great, but it's just not as slick, and doesn't look anywhere as good as it should do, especially not on pc anyway. The inconsistency of the online play bugs me too, sometimes a couple of shots will kill someone, sometimes a whole clip will fail.
And don't talk to me about the spawn engine, thats something for a very long, grey and rainy day.