Let me get this straight, so if my binding is set farther back my body would not naturally lean farther back due to my wider stance leaving me UN-centered or do the laws of physics not effect you as well.
Look you got a pretty sweet entry level board to refine your skills. If it's going to take a brand spanking new board to get you stoked again & on the hill then go for it. But until you put in the time & practice don't expect dramatic results. What most people that know there shit are trying to point out is a lesson or two will help you maximize that time & practice, Thus equaling faster progression.