Many class E airports in the USA and Canada do not have reliable comes to the ground. Pilots get the clearance by phone or from the Unicom. Horror Shock. How can an un qualified Unicom operator pass on a clearance? We are all going to die!
A trial at just one airport. Say Ballina would be a good test . Many were against CTAFs when they were introduced. But they seem to work.
Many were against the removal of full position reporting for VFR. Now only Bloggs wants to go back.
Search the world and copy the best is what I tell school groups who are looking for success.
And you don't have to import the full US system. That's a myth used to stop change. All their IFR approaches are in a minimum of class E. We don't need to do that at Birdsville. But maybe worth trying at Bainsdale!