"Anonymous. Shape. As we all know to turn the head to the left is not shaping to the left. The lady can shape by varying degrees to her left from the frame presented by the man. The man's right arm is set in plaster, it stays where it is. If I as man shape to my left because I am trying to cantilever agains my partner will have a tendany to lift my right side.. One more thing the ladies shape is up and over, not down and out. What do you think."
Don, apparenlty I have to repeate myself. Shape and stretch are not the same thing as sway, broken or otherwise. No cantilever is involved. No loss of balance is involved.
What you are criticizing in terms of topline incline is a broken sway (or even simply a broken frame), which would in most cases be a mistake. But it is not even remotely the same thing as what I was explaining the necessity of.
If you can't tell the difference between left stretch and broken sway, then you are not yet at the level of dancing to be able to include this element without firsthand help from a teacher.