Surely many of the points listed above (most of which I would concur with) should have been taught correctly in the first place by the training pilots employed by the company?
If these "misunderstandings" are widespread then that would, imho, point to a lack of standardisation in the training departments of these companies?
And please, I am not having a knock against training pilots (I speak as one who did the job for circa 15 years including TRE/IRE and a spell as pilot training manager) rather than the system (or lack of it) which has allowed these "misunderstandings" to propagate.
Surely it's about singing from the same hymn sheet rather than trying to "please teacher"?