My problem with this argument is two-fold - one, we don't know what level of tech optimization might be available post-War (who knows what might get salvaged from Romulan Warbirds, or picked up from our allies, after all), and two, the last ship we worked with in either thread that had four nacelles was the Constellation-class. Which, rather notably, had issues when it came to providing power for its warp nacelles and other systems (ie., the old quote of "I can give you shields or Warp 7, but not both"). I'd rather avoid the risk that we wind up with a ship that can do Warp 5 or have hull polarization, but not both.