Warped9,
I've been reading the thread as more comes and the designs get fleshed out, and I've been mostly silent, because I think something like this deserves reflection before making rash judgments. As usual, the beauty in your designs is in the details, and I find myself nerding out while checking out each image.

The thing that sets your work apart from the pedestrian stuff that permeates the Trek fan web is the obvious care for the subject matter. Like parts of what you do or not, the love for it cannot be denied.
And I think my one positive contribution to this thread will be an observation that just fully formed in my mind yesterday: you said earlier that part of the reason you wanted to make your warp nacelles shrink down, to suggest some future version of warp technologies, kind of like the TNG artists did for the Enterprise D. The reason that the scaling down works for the Enterprise D is that they likewise scaled down the secondary hull, to maintain the sense of scale, together. Makes sense right? Main engineering is in the secondary hull, and as you also said early on, your new approach may not have a warp drive the size of a walnut, but to my eye, it would be best served visually scaled down to be more cohesive with your nacelles.
I think your struggles with getting the nacelles' size just right reflects your observation of the mismatch of scale between the nacelles and the secondary hull.
I love the basic morphology of that hull, and I love what you've down with the interior of the shuttle bay, but I'd experiment with reducing the size of that hull 20%-30% before you get too far with the little things that won't allow you that luxury.
Just my two cents.
