Well the ship, even though using an archaic design, is a test bed for a new experimental warp engine efficiency setup, and several other systems launched a few years after the events of ST:Nemesis. The systems used on the Branford are later distributed slowly throughout the fleet after her first successful test flight, meaning that she is the only ship of her class.
Also, I didnt make the nacelles in the end, I had done a couple attempts but FarShot kinda just, made them and gave em to me one night and after a bit of tweaking I got em to work with the ship, so he gets credit for those.