Don't worry, RA-AUS will cease to exist in a couple of years. CASA has already begun preparations of their equivalent system as of September 1st.
It's called a Recreational pilot licence and mimicks the RA-AUS system like a mirror. Why would we need 2 systems that do the same thing? bye-bye RA-AUS.
Once everything's on the CASA register, they'll all get bent-over by Air$ervices equally.
By the way, Airservices has been charging for VFR airspace transits for a few months now, to the tune of $25-$40 to fly over the top of a class D aerodrome. With that kind of cost to have 3 short interactions with ATC, it'd be better value to go IFR and get charged by the nautical mile at a fraction of the cost...