Re: "The Stack and Tilt Swing: The Definitive Guide..." by Andy Plummer and Mike Benn
Second, the club will do that the more you can maintain your flying wedge. Give it a try.
Third, again, it's a posed swing, so where he looks in reality (i.e. when the weight of the clubhead is moving and your arms have momentum, etc.) may be different than where he looks when posed.
Weight moving back is usually accompanied by a maintaining of the right knee flex. Your hips won't turn as much, your right hip won't get higher, and your head drifts right. Your shoulder turn becomes flatter and the hands don't get anywhere near as deep as they should be. You lift to complete your backswing, and your right elbow leaves the ribcage.
Coming down, you not only need to time the head shifting to the right, but you have to somehow delay the opening of the hips since they didn't rotate enough to start. Plus, if they rotate too much too soon from there, they'll get in the way of your hands and you'll come over it every time. Also, in addition to timing the head movement back to the left, you have to time the club dropping back on plane.
Sure seems like an awful lot of work.
Plus, the "lack of a weight shift" in S&T is more of a feeling. Since your chest and thorax rotate about a point in your spine, and your arms and the club have weight, the truth is the weight does move to your right side on the backswing. S&T just keeps your head centered and, because your left knee is bent more, it feels as if the weight has stayed there. So to Mike and Andy, "weight shift" is synonymous with "head movement" and goes against the "feeling" of S&T, but not the reality of it.