I think Owen has summed it up just as a few others have in the past.
What I am averse to is changing an airspace system without the staff or facilities.
Some of what Dick is bringing up time after time has merit......... problem is we do not have the following to help facilitate the steps forward, Mandatory transponders or at least CTAF R and above, not enough ATC facilities and not enough ATC's to man the facilities.
Fix them and we are in for great change, but don't then ask about the cost...
J