It has been mention before, I believe, but I would really like to see this ship as a command-&-control-cruiser-thing.
As in,
low armor (a bit less than... say, the Corvo?)
few weapons (5-8? Maybe 1-2 GB turret-capable slots for GB missiles?)
low energy (1mil-1.5mil?)
larger cargo (600-1200? Since it would be carrying lots of sensitive electronics, and maybe some troops (going back to the original idea of a military transport)?)
That's the best I can think of at the moment. Might come up with more ideas once I have eaten something.
