This map looks amazing. For a port of your own map you did a great job improving its visuals for CS:GO. The eastern theme is near perfect and this looks like it would be a fun Arms Race map. I should say I never played your zombie version though in the previous CS, but I did look at screenshots for the sake of comparison.
Now, for the specifics:
http://www.nautikdesign.net/csgomaps/babylon/
Here are a list of screenshots I have taken of small bugs in the map. I will reference screenshot numbers in this comment so you know what your looking at.
Why do two CTs spawn on top of the truck? I mean, its not that big of a deal, but does look odd and doesn't really make much sense realistically speaking.
Your lighting between inside and outside in not balanced, causing HDR to way over expose the outdoor area while you are indoors.
This box is floating awkwardly off the edge of this displacement.
- Screenshot 11, 12 and 13.
You could use some more skybox details right here, buildings, tress, etc...
- Screenshot 9, 10, 18, and 19.
These vending machines are places at unrealistic angles. Some face the walls, which would make them hard to use in a real life situation, and in one screenshot there is a vending machine that is outward from the wall about 2-3 feet. Looks weird, it would probably look better tucked away in its rightful corner.
Ok, so i know this is going to be a zombie map in the long run, so barricading your self in a room with physics objects would be cool, but do you really want your players doing this during Arms Race? Also, in 21, I got my self stuck in that room by barricading the door with the couch, I could not move it out, I could not jump over it to exit the doorway. Would have had to console command kill my self or wait to get killed on a typical server.
And who the fuuu gave this a rating of 1/10 when I first saw this. Definitely does not deserve that. Much hard work was put into this I can tell.
EDIT: You should use sv-cheats 1, cl-drawhud 0, and r-drawviewmodel 0 for your screenshots. (Use underscores though, GameBanana screws them up in comments)