I loved the CZ, then they put the price up to $500 and I haven't used it since. The p250 is basically an ak in your pocket anyway, I can picture a lot of armor/p250 buys now, as the reward money and pull out time for the CZ makes it such a pointless gun in MM/Comp.
Train looks amazing, B still looks a nightmare to take, but removing the ramp on B certainly makes it appear easier (I've yet to actually play it to test these theorys), and A looks much easier to take as T, both the entrances at the T side are closer together now, I believe you can flash over from spawn (haven't tested this, only just in the door, going to try it now) which will make going onto A a hell of a lot easier.
The m4a1s price boost is scandalous, but after the last 2 majors, they did notice that the a1 and 5x as many kills as the a4, so maybe its to encourage more a4 users. Personally I thought paying less, for less ammo made sense. I'm still going to use the a1, I like the fact you can kill people and no1 knows where you are. 60 bullets is more than enough IMO.