Dick, it doesn't matter what changes are proposed to the legislation, when it comes to GA, CASA will interpret the legislation as they wish. When it comes to airline regulation (your ETOPS example) they have no option as the industry world-wide has decided that twin engine aircraft is the way to go; if CASA tried to enforce 4 engine operations into Australia they would be very quickly told where to go.
Until GA decides to unite and to challenge CASA then it will be business as usual; "what end of the pineapple do you prefer?"