So this is quite good for a second published map, but it may be a bit large and ambitious. I would try more low smaller maps, but its all your choice. Now for some feedback!
I found this section really cool, geometry wise:
But this mid spot is way too large. The platform in the middle is only accessible through jumping classes. Not even a scout with the atomizer was able to use it:
This drop down from spawn gave me a heart attack the first time i used it, maybe put some signs around the door (not too many though) or reroute it.
And finally, even though its one way, its usually not a god idea to put a door from spawn to the Intel, i would at least make the classes walk around 3 more corners:
Otherwise, I like this map. Its walls seem a bit tall for now in mid, but at a later update you could easily scale them down and make themed buildings out of them. Also, the stairs a re a tad deep in some places.