BF1942, Vietnam, or BF2 weren't this clunky. I only played the BF1943 demo, but that too seemed to have less weight behind actions. The only action I remember with as much weight behind it was going prone. I mostly don't mind it because the game is so much fun, but some aspects just feel confusingly bad like dying or the knife. I don't think it should be exactly like MW2 and I'm only comparing the knife movement here: In MW2 when you stab the air, it is clear you're stabbing nothing and the feeling, sound, and visuals confirm this. In Bad Company 2, stabbing the air feels like you're stabbing a thick weighty chunk of air with the same mass as a human body; the feedback you get when you do stab someone doesn't let you realize this until the score pops up. As for dying, I never know why or that I died in BC2. It isn't about the killcam being the way it is either, it had to do with no real impact of the final shot or w/e that killed you. Even something like KZ2 gave you a crunch sound or something when you died. In BC2 you fall down, the video of your killer pops up, and you're confused.
I still really am enjoying the game despite these small problems. I'm pretty much set on buying it, I'm just holding off for that proposed Steam 4-pack. I think I actually enjoy the "game" part of BC2 more than MW2, but a big reason MW2 is enjoyable outside of the game is all the goals and leveling up you do while playing. It has a bit of the appeal of an rpg that keeps you playing. BC2s upgrade and reward system isn't as satisfying, though it seems to better reward and advance your play style whereas MW2 unlocks weapons for all weapon classes at set points.