[O.B.Left]

The only changes I have made (so far) are on the backswing with increased hip turn and flatter hand path. Am I on the right track?

It looks like you also added a bit of Hip Slide with a Delayed Turn as well. Nice. Thats an amazing change in a short period of time, you are very athletic.

If you feel like your swing is getting too long with that added Right Hip Turn for some shots, you can employ 10-15-B Delayed Hip Action. Where the Hips turn a predetermined amount only and then semi lock. This will stop the Shoulders turning at a preselected place , tighten the left side tension and set the stage perfectly for the Hips to initiate the Downstroke Shoulder Acceleration. (Which is the main purpose of the Startdown Waggle drill). Something you do quite naturally but the Slide is going to ramp it up a bit as it takes out the slack in your left side.

Like everything in TGM these are not " moves" or "positions" but Alignments. You dont just turn your right hip any old amount , you turn it just enough so it can achieve its primary purpose (allowing the right elbow to pass on the backswing without sending it to the outside , "roundhousing". And no more than is necessary to allow you to turn your shoulders the desired amount based on your own personal flexibility. Too much is just as bad as too little. Most guys these days tend towards the latter and freeze the Right Hip and the pivot in Startup in an effort to set up immediate tension for power reasons but see their right elbow avoid a collision with the "Stuck" Right Hip by "roundhousing" the elbow and Hands to the outside of the Inclined Plane.

This ground- up "pulling" in Transition is Swinging, Drag Loading per 10-19-C, if you have the book. If you dont , please get it. It'll save you a lot of grief trying to research these terms.