Many people think of this figure as being linear. Starting to rotate the figure much earlier and moving toward diag center can help.
For the man, often on the third step the heel is dropped too early. Also, it can help to think of turning the foot of the second step almost against line of dance (often it is not turned enough). Also, the man can end up changing the frame too much, such as the right elbow veering behind his back or left left elbow veering in.
For the lady, continuing to move toward diag center well into the third step can help her stay on the outside of the turn and help the rotation. Also on her third step, turning the toe almost to line of dance can help make the pivot easier. The lady too can lose her frame if she starts to turn too early on the third step.