Interesting thread Go Low.
I have read the original thread,but not all the post's on this one.I do notice some tour pro's in their practice swings,leave all of their right foot on the ground on their downswing.Much like a fairway bunker shot advice,to keep the lower half passive.
The modern teaching is away from the reverse 'C' position,a swing thought on the lines of what you are saying,legs support the upper body,rather than leading the down swing.
The hardest thing(or impossible) is to teach feel,and what you are advocating is just that.Golfers first have to experience a movement, before it can be stored in the memory bank.
I am teaching my 10 year old daughter at the moment ,who happens to be left handed,and guess what?I bought her right-handed clubs.
I think you will find a lot of the greats were left-handed.....food for thought.