When the two professions pilots on board the crash plane at Benalla allowed an aircraft to stray 7 miles of course and crash into terrain most other professional pilots claimed that a competent pilot would never make such a basic error.
That's why ATSB made no recommendations to upgrade the airspace to E so the advantage of the existing radar coverage could be maximised .
Normally when an approach radar type system is installed as per Launceston it is actually used by controllers to control aircraft. But not in Australia.
Our pilots just don't need such safety features - being superior to those in other countries and not make normal human errors.