Robert Bowling has stated SEVERAL times that MW3 isn't about power positions. You can't post up in a building with a claymore and get a 30 k/d. It's about the "gun on gun gameplay", hence the multiple routes to every location and the fact that no one really camps like they did in MW2.
The maps were designed this way. MW2 was a pathetic camp fest. MW3 is different.
I agree, and in my opinion the maps on MW3 are too small with far too many buildings which wouldnt bother me if it was only 1 or 2 maps but its all of them which just makes everything a massacre which isnt really that fun and there isnt really much opportunites for using sniper...which is just my own opinion. I think some of the MW2 maps were better but thats to be expected.