Not had time to read all of it it yet, but one key point made "was that the pilot was not trained in or had not practiced the escape manoeuvre".
Am I missing something here, because the escape manoeuvre is simply to roll upright at the top, or very shortly after the top, and fly away when it is obvious there is insufficient height and/or speed to complete the loop.
We learned the "roll off the top" aero very early in our RAF training.