Before I do anything more to it I thought I might make it more available for feedback.
I will very likely be making it able to work with vehicles in the future and adding more space on the outside and between the different "segments" (centre, bases and "mazes" near each base).
And no, the bold flat colours and grid aren't staying, I will be sorting out the map layout before aesthetics. Though general clutter like random crates will be given consideration ahead of time they wont actually be "built" until later (not including crates in places such as warehouses and stuff because those would often be the part of the primary cover and map layout).
Map texture: http://dl.dropbox.com/u/3034513/Subvein ... uice01.png