My thoughts...
MTOW to 650-700Kg or we could end up with a whole lot of poorly maintained C150, C152s etc that are flying time bombs with the potential to very quickly give us a bad name and a reason for CASA to take over
limited entry to controlled airspace (VFR lanes) This is a safety issue.
We are getting clearance to 8000ft, how much higher do you want to go?
Apart from that, why should we change? If I want to do anything extra, I can convert to GA to do it. Leave GA to commercial operations and RAA to fun flyers
If everyone is convinced that the existing model is unworkable or needs changing, dont try and re-invent the wheel, look at what is working overseas and use that model
As I said, just my thoughts