[12 piece bucket]

The blue line is a little too high for Turned Shoulder Plane angle.
Usually it's drawn up through the armpit at address. (10-6-B)
The Standard (flat) backstroke shoulder turn component is meant to take it back to that line.
He's not far under it.
You have it at the Squared shoulder turn line, a much steeper plane. (10-6-C)
Hips too active, weight rolled to outside of left foot, loss of "left anchor", release could be delayed some more.

I don't necessarily disagree with your analysis of the line drawing . . . but I didn't draw the lines. Somebody else did . . . they were just on there from the site I pulled the pic from.

I do have a different take on the hips though . . . . look at the head . . . are the hips going forward or is the head backing up?

compare Hogan/Yoda to Graham. . . look at the tilt in the shoulders . . . Look at the difference in the straightness of the right knee . . . If you drew a plumb line from each players nose where would it meet the ground relative to the feet?