The comment on the ATIS is essentially repeating what is also written in ERSA and AIP. There's only a little over 1000m between the two centrelines, it only takes seconds for two aircraft to get very very close if they go through.

CASA/ASA is always striving to improve saftey.. this may be a reactive response to some recent incidents in Australia or just a nice saftey reminder.

The changes coincide with this recent bulletin that was put out.
Nothing new, all stuff we're clear about but nice to get a reminder.

http://www.airservicesaustralia.com/...Approaches.pdf

If you read the CASA 'flight safety australia' magazine you'll see they have atleast one issue each year that reminds you to have enough fuel. Simple enough, right? :)