Bob, this is a quick reply as I have to get to work on some honey-doos -
Perhaps you'll get some feedback from those more qualified.
No thread is to late to rekindle

In Rob's latest article (from recollection) he emphasizes 4 major aspects of the "transitional" style. Rob emphasized the divide and conquer method, i.e. 1 thing at a time
Couple that with Ron Clifton's "Go for a walk philosophy" --- slooooooooooooooooow motion to teach and ensconce new movements and patterns, e.g. the scene from "Roadhouse" where Patrick Swayze is practicing martial arts moves slooooowly.
And yes, working with an enlightned observer can be a big help, because for most of us, there is a gap between perception and reality at times

Articlles posted over the years in BTM have covered a lot of the aspects.
Look for articles by Bill Hall, perhaps his DVD might be appropos?
You may recall several articles by Bill that have drills, i.e. how to get your body in position, etc.
You know that song "Them Bones", e.g. the footbones connected to the ankle bone etc ?
This harknens back to something Don Johnson said in one of his videos 'If you don't start right, it's hard to finish right".
Thought: If the foot work is giving you trouble, work on the foot work without the ball, then add a weighted object of some sort, then the ball.
If you think it's just the last step, then you can do a one step and focus on the slide.
If you have no problem during the drill then recall "Them Bones", i.e. something prior to the slide is preventing the desired result.
Thought to preclude LIFT - John Jowdy uses the term silky smooth; also follow through to the pins; look up his "Drag Shot"
p.s. oft times "new" things are built upon old, or enhancements of old things.
Bob Summerville wrote a few articles on balance and the approach, e.g. ball position in the stance.
There is an old movie about the Crusades in which the Saracen is meeting with King Richard.
During the meeting, there is a comparison of swords.
Richard wields his broadsword and cuts an iron rod in two.
Saracen says that "you've merely demonstrated the strength of your arm.
he then tosses a silk veil into the air and alows the veil to land on his sword. The veil is cut in tow merlely by landig on the blade.
Saracen's sword is the modern game, Richard's an older game.
Try the less is more thought ,,,

"Great minds discuss ideas; Average minds discuss events; Small minds discuss people."
Eleanor Roosevelt
Be well, John K. in Glendale Az.