At the risk of this being called a Necroposter (I'm actually new to this site and this is one of the best ever fan design ships and deserves bumping), I just thought I might make a suggestion. You have the lower-most torpedo chamber the same size as the one atop the secondary hull. You might want to have the lower "box" chamfered on either side, with a single larger tube--and or a tri-cobalt tube. (AWALT was it?)
I wonder if you might recess two slightly modified megaphaser tips side by side in the recess that is currently empty, with SFB drone racks to either side. The rational for such disparate weapon designs would suggest this be a testbed vessel for TACfleet.
Lastly, you might want to have a deflector spires or other sensor attachments underneath the fins (below the nacelle supports), with perhaps a red glow in the vents underneath the nacelles to suggest a new type of hybrid warp-impulse drive similar to what we see on the tips of the old Vulcan shuttle/dockport craft from STTMP.