Looking at Yoda's many different vidoes, it seems important to use a walking/mark time motion together with the right forearm takeaway in the backstroke. That means
lifting the left heel. This is probably a good thing because it makes it easier/more natural to to put the heel down again and do the necessary weight shift in the downstroke? (together with a little hip slide to the left and bringing the right elbow (more) into the right hip area (for swingers). I wonder if I'm on to something here. If not, please intervene.
Any comments from my learned friends?