Having played the maps for a few days now, I like about 1/3 of them. The problem is that they feel too big sometimes for how many players are on the map, many of them have too many "oh, I came around the corner and gotcha" moments or too many hiding-behind-walls-or-in-windows spots, and the flow when running through them doesn't feel good.
It feels like they built a big sandbox and then threw a bunch of shit in there randomly without much playtesting to see just how well the maps worked all around. = /
I agree with those comments, the maps aren't well built or organized. I rather deal with MW3's BS than BOs BS. At least MW3 is consistent.