Old Akro you clearly have too much time on your hands.
Instead of wading through ICAO, FAA and CAA documents, try CASA's CASRs and MOS.
You are aware that CASA is the regulator and Airservices is simply a service provider authorised by CASA for various functions, and subject to close scrutiny and audits?
It's CASA regs & MOS's Airservices must comply with, so any "gold plating" you perceive is due to those regs & MOS's.
Rest assured - and logically - Airservices wouldn't be likely to be doing any more or any less than the regs & various MOS's require.