You can read that accident report and come to any conclusion that you desire. We all know that witness statements can range from outrageously incorrect to perfect accounts. The unfortunate thing is that we never know which, without solid proof. As with the famous Chinook accident, we can guess, but it will all be speculation. The 'energetic manoeuvres' could be wazzing or could be a student under high pressure losing control. I know of at least one (chopped) military student who just got maxed out and was lucky his instructor was on board to recover. The wisdom of sending a slow student solo in certain conditions is the million dollar question for us instructors, do you risk destroying confidence against the risk of them crashing. It is a tough call. When I taught on Gazelle at Shawbury, I had a personal system in place for first solos. I figured that if a student had an engine failure on first circuit he had to jump through certain hoops. If the lever was lowered quickly the survival rate went up over 50%. Any speed in auto would do
however a flare in the last 100' would mean probable survival of the crash. If they hit a decent field then checked/levelled and cushioned, it would be a miracle!!
You have to give the student some rope, how much is the bit you have to justify at an enquiry.