Usually I'm the guy who complains about maps that are too dark
But here it's really dark, all the brick corridors have no lighting at all.
I quickly tried to triple the number of lights at the ceiling, and it seemed about right for me (each row offset by 8*4m, lowering the radii from 400 to 360).
Also the ceiling gets very bright, maybe you want to lower the lights a bit or add some spotlights and/or dziq's light cones?
The specular on the alpha/omega panels is super bright, what about /vdelta vshaderparam specscale 0.2 0.2 0.2
Maybe it makes sense to connect the sniper/mine room with the bases using some more corridors with stairs. Not sure if the hiding/rocket spots on the roof girders are a good idea.
That being said, I think it's nice a theme / map concept. I imagine going through the maze is slow, but gives you at least some cover from the all mighty snipers.