As a pilot I really don' care whats going on at the back be it plus or minus or for that matter where the center of pressure is at various speeds.
True. The only thing that's useful for a pilot to know in this context is that the induced drag of the tailplane reduces when the aircraft is loaded near the aft CofG limit. That may save a few percent fuel. So if you have the option of loading something in the back vs. the front without exceeding CofG limits, try and put it in the back.