It's all one color, and that's a bit of a problem if you want it to be interesting.
The buildings are all rather one-dimensional and seem a bit weird, but this might be a personal thing. The buildings don't stand out in any way, and looking at the pictures, it seems a bit as if there were some building errors?
You also seem to have taken from Bushido's idea of a railyard suspended in the air, but this isn't very common or practical in real railyards because it doesn't make much sense and even contradicts the very purpose for which a railyard is built. (again, a bit of a personal thing, and with the way Bushido does things it worked well).
My main problem with it is that it's flat and uninteresting in the color department and there's very little in the battlefield itself besides empty corridors and the occasional crate or so, and it doesn't do the place any favors.
You seem to have put a fair bit of effort into it, and it has potential, but it really doesn't have much going for it now besides size. Then again, I might be entirely wrong! You do what you want with it, because I have no idea what you were trying to do and you're the only one who can make it as you like it.
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