You can't compare EK to the traditional carriers on upgrade pass rates as the traditional carriers would have FOs sitting in the right hand seat a hell of a lot longer observing both the right and wrong ways of flying. Ek tries to get away with quicker upgrades for people with previous command time and unfortunately if no prior command time, the failure rate is going to be higher. Gone are the days of 6000 hour piston/turboprop guys coming through and you can't blame these new guys with 6000 hrs right hand seat jet not being ready - it's the nature of the beast.