You'd better give me the AIP references,
Critical Mass, because apart from the introduction of Broadcast Areas (aka large CTAFs), I can't see any of what you are talking about in the 28 June revision.
By the way:
CASA decided to remove mandatory radio calls altogether and replace them with the catch-all proviso that pilots needed to make calls whenever they felt it necessary to do so in the interests of safety.
is misleading. At least two specific calls inbound and two outbound are "recommended", in addition to the new mandatory call. The rest, quite rightly, have been removed from the mandatory list.