Recommend taking a look at this this thread http://thesandtrap.com/t/56069/good-golf-posture
Head and eyes are oriented too high, makes it harder to keep the head steady on the back swing. Your head moves back and the hips are too shallow. Then on the downswing, because the hips are too shallow, the right knee has to flex towards the ball so you can make contact. So you're coming in a little under "plane" not transferring enough weight forward to be able to swing out to the right. Resulting in push cuts.
So I'd recommend making the entire back "softer", again look at that thread for a lot more info. Will allow you to turn the hips and shoulders "steeper", so you can keep the head steady, hit the ball more solid.
Kinda similar body type to Dustin Johnson? Here's how he looks at similar positions, notice his eyes are down, upper back is softer, same with the right pic.