I love your detailing of stage one, especially the wooded area in the beginning of stage one.
This gap between the ground and the roof is odd looking. either close it up completely, or increase the space to make it look more natural.
Got a big fps drop when I came in off said roof into this room.
Once the defense sets up, this stretch pretty much becomes no go for the attackers. Between a demo, soldier, sniper, and engineer set up around the corner, everyone who tried going this way pretty much died in a few seconds or was forced to retreat, a little bit of cover would really help
-2nd stage-
The clipping here is weird, it extends way beyond where the edge of the train car is.
The path from B to A for defense felt very confusing to me my first round on this stage, I was following the signs, but I took a couple of turns that stuck me in entrances that turned out to only be intended for the attackers.
This map feels like it has lots of potential, even with these issues it was still very entertaining to play.