Boudreaux Bob,
Im sure this has already been said but the whole reason why the UK mil use QFE is to keep it simple. High altitude on 1013, then move across to QFE when switched to either Director or Tower and cleared to a 'height'. How is that complicated? What bit of the KISS principle does that infringe?
Mil ac, particularly FJ and Rotary, fly a lot of visual arrivals (via VRPs) and visual ccts as they save fuel and time. In my experience its far easier to have initials at 1500' and fly a cct at 1000', then at say 2265' and 1765'. It also has the advantage of being the same for every airfield you go to. The alternative is to use the radalt, but this has problems when your airfield is surrounded by hills.
Simple.