Could you use the amount of bending in the right wrist to determine the trajectory? More for lower shots, less for higher shots. That allow one to adjust that variable, and the others (ball position, shaft lean, etc) before you address the ball.
I got into a discussion with an AI on another forum about this. He had had some short game lessons with Stan Utley and said Stan did not like the ball position to be moved around in the stance as this had an effect on the plane of the stroke leading to other adjustments needed to being made. He altered the trajectory by the degree of bend in the right wrist at impact rather than altering ball position.