It is very nice, but some how feels like you have tried to put to much detail into it, such as the red rings on the saucer and the blue panels on the underside of the saucer. Startrek ships of this era are typically rather minimilistic Also, Impulse exhausts look awesome as red lamps, it produces a very nice glow around it. Registry\'s and the ships name on the hull are also nice that make these ships more complete, although they can be difficult at this size. I also dont see a deflector, some thing that all starships in star trek need. Perhaps one that is mounted on the saucer like gaeassons antares (http://gaeasson-shipwright.blogspot.co.uk/2013/09/star-trek-antares-class.html) would fit, it is very similar to this ship
I look forward to seeing this finished, and for a finished blueprint :D