It's a great start, but like
Sojourner says, the nacelle pylons look like they occupy the same space as part of the saucer. And why do they hook under the secondary hull like that? Wouldn't it make more sense for them to take a more direct route to their power supply?
BUT ...
It's your vision,
blssdwlf, pick only the criticisms you agree with and ignore the rest. Make it a ship that you love, because you'll never please all of us.