Fuel efficiency?The damned carrier is nuclear powered so why should fuel efficiency matter?
If anything is a benefit of a now of that design it should be an increase in forward speed.
I think your average nuclear carrier is refueled every 20 years or so.It maybe even longer between refuelings.
It does matter...the more efficient the hull design the less wear and tear on the propulsion plant, and the less power that needs to be generated by the reactor plant.
This 12-15 percent increase in efficiency translates directly to increased service life of both the reactor and the propulsion plant. This translates directly to more time at sea for the USS Ford.