Ian, don't kid yourself about this "Drivers License" medical that has been introduced. If you read all the fine print of conditions it is basically a class 2 medical but is done by a GP not a DAME. It does not allow people with many common conditions to be issued with it. For example insulin dependant diabetics will not be allowed to have it, yet we are allowed to fly under RAAus if it is controlled and with appropriate approvals by our GP's and/or specialists.
To me this is a very real difference, under RAAus I can fly, under CASA I can't. There are many other conditions that are also excluded.