But EK, after all the four high-level 777 Capts failed the A380 transition send them back to fly their John Deere. In any other airline that would have been it.
In any other airline they would've asked what's wrong with the training department. Just going from an Airbus to a Boeing or Boeing to Airbus (Or Fokker, or MD or DC or whatever) is daily business all over the world and having people fail their training is source for concern for the trainers, NOT the trainees.
Luckily MM is trying to improve things and is already making great progress.