Made the difference for me; I was a low-mid 80's shooter until I improved my short game.
If you are near Jackson,NJ,Denver will be teaching there beginning in April. If he doesn't help you,I'll tell him to give your money back
What is your typical ball flight? Start left,straight or right? Does it go slice or hook? My serious misses are duck-hooks;I tend to have my weight too far back at impact,come too far from the inside and
release too strongly.
Sorry,I've not read your post yet. I don't worry about the power being generated by my shoulders;I focus on keeping my weight on my front side,and going into the ball with the butt of the club leading until the last instant. To accomplish the latter, I feel as if I'm hitting the inside/rear of the ball with my trail hand still hinged.