A statement about FACTS.
I too would like some facts about airspace. The facts are, if the airspace is in place, no safety case or justification is required, by default we accept the current situation.
If this is true, why are we changing the current airspace and why are we changing to another outdated system.
We cannot get current airpsace facts so we cannot compare the current system to any new system. Seems odd, but thats the way it is.
The USA is looking into changing their system, but nothing has been finalised. Europe on the other hand has already done theirs and started a plan that will take a number of years with the end product being aircraft based, ie Known and Unknown.
Known will be similar to controlled airspace and Unknown will be similar to "G minus".
ICAO is also currently working on new airpace and the alphabet system will be dropped and probalbly going with the European Known and Unknown system.
So if the Smiths and others force us to the AUS NAS, we will once again have a unique Australian system that is not compatable with any airspace in the world all for so called ease of use for VFR pilots.