LS, the cost in introducing a different system - ATC training isn't cheap.How many millions have been spent already? The risk involved in transitioning from one system to another - e.g. the AIRPROX near Launceston.
I'd like to see you sell the mixing of high cap RPT with uncontrolled VFR to the general public. I doubt the fare paying public would be happy about it. Why would the taxpaying public think the unnecessary mixing of fast jets and VFR a good thing - risking expensive jets and lives of expensively trained pilots for the convenience of "rich boys and their toys"?