If my memory regarding the Launy is correct, the RPT jet was given the option to either turn left immediately for a RH downwind and base, or to overfly and join for LH downwind and base. The crew of the jet did not transmit precisely what there intentions were, and did their own thing (overfly for LH downwind). So they did not do themselves any favours, instead of being in an alerted see and avoid area, it became see and avoid only, based upon their actions. So if the critics of the Launy incident do not want to see a repeat of that incident, then something has to be done with all of the aerodromes in Class G that are serviced by RPT. Mandating radio carriage in Class G isn't it, because a non radio aircraft is an aircraft which (1) doesn't have one fitted, or (2) is on the wrong frequency, or (3) volume is too low, or (4), or the PIC presses the map light instead of the transmit button, or (5) doesn't use it properly, or (6) the list goes on. The mitigator has to be a third party, that's the whole premise of the ICAO airspace model. Risks becomes intolerable due to mix/volume, introduce another mitigator.