Dick,
Why don't we at least try the procedure at just one airport?
If it requires the employment of some extra ATC's so be it-
Mate, I'm sure the procedure you're suggesting would work great and people would get used to it quickly but they DO NOT have enough staff to run the current airspace or even the major airports. Look at the TIBA Notams.
There is no extra ATC's. The whole world is short, RAAF and ASA cannot recruit or train more. ATC has been gutted and introducing more procedures right now will probably break some people, leaving even bigger gaps in a system that is slowing breaking down.
Sorry for the drift.