You haven't been paying attention. Both the DT and the AAIB are saying the manoeuvre was started from 200 feet agl. That does not need clarifying. The "too low" comments came from people who weren't even there who don't understand that it is possible to enter an aerobatic manoeuvre from one altitude and exit at a higher one through energy management - something fast jet pilots here will fully understand.
So, again, the manoeuvre was started from 200 feet and, all other factors aside*, it is perfectly possible to complete the manoeuvre safely from there.
* By which I mean no mechanical or physiological issues.