Dick
I am a wide reader - fact and fiction - and have read your "Unsafe Skies."
It strikes me as a book with some mix of opinion and fact, and has no doubt been read by many including those in CASA and Airservices who value different opinions.
But, it does not strike me as a safety case under the normal parameters for such.
I would expect something researched for the specific case you are putting and without the clutter of the rest of the book or the constant reliance on a 50 year old NAS system that is about to be overtaken by the benefits of LL ADS-B in Australia. If a safety case exists for Australia for your radar following theory for IFR to treetop level, make it for Australia.
Rhetoric is no substitute for fact - don't ignore Owen's comment that the radar is marginal at best below 085 at BLA and certainly at/below MSA. Of course, Owen's could be rhetoric also (apology Owen, just making a point) so it would be good to provide actual supporting data that are validated.