Not a huge fan of the shoulder advice bu thumbs up on the bent knees. Quiet upper body is the way to go.
Try activating your hips more. When initiating the toeside turn, thrust your hips out (in a controlled manner) and you'll have a stacked platform that is stable and powerful.
By using the hips in conjunction with the toes of your front foot, you'll strengthen the turn sooner and spend less time fighting to hold the edge.