Having been born and raised on QFE and then converted to QNH operations, I have to say its a no brainer.
You don't want to be using different altimeter settings at different airfields. That's just asking for trouble. It's the final hole in the lined up swiss cheeses. You want to be using the same procedures wherever you go.
QFE has some pluses, but the inability to use it at high altitude fields is a show stopper. (not just awkward / lots of twisting but total inability because the darn thing can not be set low enough!)
I do find it mildy amusing that elements within the RAF find the concept of correcting for elevation in the circuit or approach as being so daunting, given their usual penchant for pointing out the superiority of military pilots and training methods. Its only addition after all! Perhaps ask the MOD for a couple of plastic altimeter bugs. They probably won't cost more then £50,000 each
