I should have asked Richie this in that other thread a little while back, but...Define Proper footwork?..Please
There is no such thing as 'proper' footwork. I believe that most people are just far better off avoiding getting the weight up on the toes before or at impact. Some can get away with it. Lots of LPGA players get away with it.
Having the right heel off the ground is FINE, but I would highly suggest keeping the weight off the toes...which can be done with the right heel off the ground. The entire keeping the right heel on the ground at impact is really just a simple way to keep the weight off the toes. Same thing with the 'right heel should be closer to the target than the right toes at impact.'
Put it this way, if a golfer came up to me and they looked like they had a pretty good swing, square clubface, etc, but then their cranium moved away from the target and down on the downswing, the first thing I would look at is their footwork and if I saw the weight up on the toes, I would suggest that they work on that.
Getting the weight up on the balls of the feet is
not the same as getting it up on the toes. I prefer to have the weight in the middle of the arches of the feet at address because it prevents me from getting the weight up on the toes. But for some people, they may have a tendency to get the weight more towards the heels, so they may need to have the weight up on the balls of the feet at address. Different strokes for different folks.
Analyze the problem, find the root cause of the problem, come up with a solution and customize it towards the golfer's skill and abilities.
3JACK