Looks like it came together nicely. I think you could've added a little more details in the diffuse here and there (like at the end of the tunnell, where those 6 grill like cilinders connect with the other thing, there's no ao, no extra detail in the normal or diffuse map, etc...) It's small stuff though, but i think it could help alot...
There is one thing I would really change though. and that's the lack of good AO / shadows. If you could just add a shadowmap to the largest props, it would definitely give it more depth imo... (and kill your compile time too probably
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but other than that, looks very nice
