Geno’s shift is a real thing. I worked with him and IMO you have to work with him to see it. I am not ready to do a full review of it. It isn’t a one size fits all thing but depends on how you perceive the balls. IOW, I don’t think it’s fair to dismiss as a gimmick.
I had opportunity to view Geno’s Generation One DVD, IMHO it was nothing.

Returned it to owner, who had same impression.

If you have no fundamentals, you will have zero consistency pocketing ball after ball.
Dr. Dave shows you how to Aim. Dr. Dave is a real Teacher.