I read the report by the SA CAA at the time of its publication. It was badly written, badly researched, and prejudiced. I have no connection with Thunder City other than as someone who has visited several times and who has considered a flight with them (until seeing the price!)
The TC website is only partially operational but their statement on the front page seems to bear out my thoughts.
Welcome to Thunder City
It seems clear that risks were taken and the result was fatal and tragic. Dave Stock was a much loved and highly respected person in his circles, but accidents happen all the time and hopefully each accident makes flying safer.