[Yoda]

What are your thoughts on the varying opinions between the way the shoulder can turn in the pivot (flatter... ) verse a steeper counter part.

I teach a Pivot that turns the Right Shoulder to the Plane.

Steeper Plane Angles, i.e., those dictated by the shorter clubs and their more upright Lie Angles, require less Turn than those required by the longer clubs and their flatter Lie Angles. In both cases, the Hands -- indeed, the entire Power Package -- receive the support, direction and initial acceleration of the Downstroke Right Shoulder Turn (toward the Plane Line and the Ball).

The attached photos -- the first in Start-Down and the second as a drill in the Turned Shoulder Plane -- illustrate the ideal in-line Hands-Right Shoulder alignment to the Plane.