Very good one, Hemi! Atmosphere is perfect. Same goes for custom meshes. Textures quality could be higher for a modern game, but that's not such a big deal.
Here are two exploits I've found:
Exploit 1
Exploit 2
Simply put blocking volumes there, and it should be fine.
These stairs railings look weird.
From the gameplay aspect, this map is way too small. Don't get me wrong: claustrophobic look of colonial space base is awesome. But there is just nowhere to go. I'm afraid that after people get used to its atmosphere, map will become boring really quick. I suggest adding at least one more area.