The CAAP and AIP amendment didn't change anything - CASA's change to the AIP wording just clarified things. The procedures have been in for some 10 years or so despite some claiming or thinking otherwise, I suspect largely due poor education, lack of understanding and confusion due all the changes 10 years ago. The answer to one genuine question at the time being "turn off the radio and listen to the stereo" wouldn't have helped pilot understanding of the situation then.
As I said in an earlier post 1) had there been problems or in the event there are in the future, ATC will certainly say something, and 2) there are measures CASA can - and do - take to address chatter problems.