I like the "idea" of keeping the left hip still. This would have the affect of not sliding forward and that keeps you behind the ball.

Rotating and not sliding is perfect. But if you slide, rotating AND sliding is going to cause all sorts of problems. Not sure what your problems were to beging with.

(Always trust a visual lesson over a guessed solution from someone intrepeting your swing from a discussion board)

So having you not rotate your hips fixed your slide, and you now are able to freely go at the ball.

(Again, only a guess)

The wrists early release from the top is a new one. This normally would create big outside-in paths, slices, weak pulls....

But not seeing what you were doing before, I can only suggest that if what you were told to do and it worked, then it worked, so keep doing it.

Some pro's will taylor a soltion to your problem. Rather then taking a general idea as gospel and rebuilding your swing to that idea.

Some pros make a living of knowing just what to say to each student and that is only for THAT student...not to be intrepeted by another. You might have found that type here.

If the early wrist release is from the gospel type, then an interesting approach it is.

__________________
I'm a golfaholic, no question about that. Counseling wouldn't help me. They'd have to put me in prison, and then I'd talk the warden into building a hole or two and teach him how to play. ~Lee Trevino