I am no professional pilot but i do have my PPL and quiet frankly the new system is a load of bull. Essentially it incoperates the American system(Which is not suited to the australian Air traffic environment) of ATC in to the extreamly dated Australian system. The only problem is that they only bought half of the sytem over
Essentiall all the changes incoperate are "rezoning" of airspace (A,C,D,E,G) and changing the rules used in them IE traffic advice, procedures, frequencies etc
There is nothing for the traveller to worry about. With this sytem being more of a hassle and safety issue to pilots of smaller aircraft
There are simply to many canges for me to list them here for you but if you are still interested you can find out more at
http://www.dotars.gov.au/airspacerefom/
hope this help. If you would like me to elaborat just PM me and i will list all the changes for You
Hope this helps
AZZAMANG