Here goes for my opinion on the ship:
By the 27th Century, ships would've moved further into having the nacelles integrated into the ships hull. Take a look at the 29th Century Wells Class for a suggestion of what to "shoot" for. Having the nacelles on struts like you have, makes it more like the 24th Century ships we all know. The nacelles themselves doesn't look too futuristic either, since if anything it would be an evolution of the design shown on the Enterprise-J (26th Century).
Parts of the ship look pretty well detailed such as the cannons (looks vaguely X-Wing:ish), and the bridge area. The ships hull on the other hand looks extremely LOW detailed, and the entire ship is way too flat. Even if it's supposed to be a futuristic Defiant-type ship, I doubt human beings would've "de-evolved" into being only 0.5-1 meter tall. You need to take into consideration the aesthetics and overall architectural layout of the ship. Taking into account that most ships have a deck height of 2.5-3 meters, and then spacing inbetween decks for conduits, EPS transfer lines etc. The ships hull looks "paper thin" in some areas at current.
I realize you are anxious to complete the model, but it would be better to spend additional time making the ship more detailed, and actually put some thought into how things would seem, if you were inside the ship. Having windows in the ceiling for example, or corridors being only a meter in height, aint very appealing to me.
I apologize if this comes off overly harsh, but that's just the way I think about this ship. The idea is sound. I would love to see more post-Nemesis type ships, and people trying to bridge the divide between the 24th Century and the 29th Century. But in my honest opinion, for this specific ship, more work is required before -I- would've considered it "finished".