[drewitgolf]

Too much Pivot Effort will...
OverLoad your Radius Power (#4 Power Accumulator) with a vicious, malicious turn rather than a gentle turn of the Pivot.
pull you out of your Pivot alignments.
force the Hips to move crossline rather than parallel to your Deliverly Line.
create a Sweep Release, requiring a higher Hand Speed to produce a given clubhead speed.

The motion of the Hips toward the ball, feels like power, but actually does nothing to add power...False feel effort. Also, the Hip motion toward the ball forces the spine to curve, rotation to stop, and can actually impede the Right Elbow and its desired Impact alignments, resulting in Throwaway.

Ben Doyle always wants his students to "sit" at Start Down.

Physical factors like tight "hammies" can also play a role.