it's not completely bad, and I also appreciate when someone study the shape so that some specific parts have a defined function.
I also like some parts of the design (the nose for example, very matsumoto style) but the overall feeling I have is "nice but simple" (and I'm not talking about the amount of details)
Some suggestions (that may cause the ship to look worse obviously, they are just things that you can try and then check if you like the result):
1-you can try to make the bridge asymmetrical, placing it not in the middle but, for example, on the left (almost over the tube on the left). I mean like a naval carrier: if the hole under the bridge is an hangar, when texturing you could make a small section of the dorsal polys like a runway (and you could also add it as a model detail)
2-from the side view, the ship seems a bit fat in the middle. You may try to increase the lenght of the middle section.
A radical solution could also be to erase the middel section and connect the front and the rear with a thin struct, maybe some tubes, or something else. The result would be to have the ship like if built by 2 separated parts (do you remember the film event horizon?).
Another solution could be to work on the rear ventral section, making it very thin, so that the middle ventral section will be in diagonal
3- probably it's stupid but it could be nice to have top/down asymmetric engines