Disappointing, but not massively surprising. It is more fast paced than any other MW game. I've only ever sniped at Resistance, compare it with MW2 maps like Wasteland, Invasion, Derail, etc, which were really good for sniping and a bit less chaotic the fine.
I quite like how the maps have gone in MW3, I don't think MW3 should try and be a long range big map battle like BF3 and should stick to being a more arcadey, reflex shooter. Though I think they missed a trick with Village, that could have been the less dull version of Wasteland if they'd been a bit more creative instead of those caves.
I'll miss killing with ya, I want to try BF3 at some point (even if I hate the player sway), but not sure I'll buy it as my unhealthy obsession with snooker has returned and my games budget has gone over to that!
As with any FPS, when it's good, MW3 is very good, but when it's bad it's frustrating as hell, that's the human element for you. Patch 1.06 is supposed to contain a few decent changes, so hopefully that'll improve.