A reverse C or pivot will create stress on your spine.

Not sure about the lifting of your left heel in the backswing, this can cause swaying which is exactly what you need to stop. Try and remain more centered in the backswing, don't let your weight get outside the inside of your right foot. In the downswing allow your hips to lead the downswing but not too much, let your weight fall naturally onto your left leg, kick your right knee in towards your left and rotate through to a full balanced follwthrough. Swing easy.