Understanding how to use a negative move (back away from ball)to get ready to swing is difficult and often done incorrectly.
Understanding how to utilize a negative move while going towards the ball is very important to development.
Sway is a form of a negative move away from the ball. As long as the hips have not been engaged. The hips should only be activated as a hitter moves towards the ball and that engagement should be in a coiling fashion. For this hitter, counter clockwise.
Hamilton moves back "to get ready" but he does not do so with his hips engaged in a coiling twisting fashion. He engages his hips to go forward. But he does so in a counter clockwise direction called coiling. Coiling is a negative move because the coiling is what keeps a hitter back even while he is moving forward.
What this 2016 hitter needs to learn is how to use his negative move correctly so that he can get into the correct sequence. Once in the correct sequence he can progress much more quickly.
Striding 1st or reaching forward with the stride foot 1st is not the correct start to a good swing.
Keeping the weight back over the rear leg is not how good hitters stay back.