It's a mystery to me why we are trained to go through all this error-prone nonsense with QFE in the first place. Why not just train everyone to work on QNH as in the US, and eliminate this altimeter-twiddling?
I stopped setting QFE and decided to just work off QNH after my first US flying trip, when the instructor doing my checkout couldn't understand why I wanted to set QFE, and showed me how simple it is to just work off QNH
Having said that, I then flew from near sea level to an airfield elev 6752ft in less than 1 hour, so setting QFE might have been somewhat difficult anyway....