I often wonder whether the Strathclyde crash was a symptom of some of the above but with a twist. We shall learn soon (I hear the AAIB have completed their findings and are in discussion with relatives before they go to press).
The (ex RAF) captain of that aircraft would have trained on the Gazelle at a time when the the syllabus would have been similar to the one you describe. Or, at least, it was when I instructed in that role at Shawbury in the mid 1980s.
But not aerobatics, because iirc, they were prohibited, being outside the terms of the flight manual.