Sick idea homie! I like the layout and the setting of the map a lot.
Some things I would perfect:
The architecture is raw, the edges of the blocks you used are easily seen. I would start making those flush and maybe add some more detail using accent pieces or prop pieces.
A lot of the rocks around the map look identical and are set in the same direction with the same rotation. Start experimenting with different rock formations and put a couple together to come up with a different look, or put the rocks further under the ground to only expose a part of it, try some stuff that cant be recognized as simple block pieces in your pallet.
Other than those two things I really enjoyed that map. Your use of piping is solid and it really brings out the possible functionality of the facility. Replicate those same aspects throughout the entire thing.