ok, 3 things i see, and ill be brief
1. smoothing: there are a few location it hink smoothing coudl improve this model up to by at least a 1/10th
2. the area on top of the bridge deck, the texture looks stretched. even if it isnt actuallty stretched u may want to suse soemthgin other then horizonatal patterns in that area.
3. the blues ont he ship are IMHO too saturated. this of course is a matter of taste, but i try hard to to use pure colors. i go for very desaturated colors and try to look to nature to give me hints on color schemes. but get a look at some trek ships and take note the onyl thing that is that blue is something glowing, like an impusle crystal.