QB runs are a means to an end. Well, not in Herman's offense... There was a good video series on Chip Kelly's offense at Oregon that broke down the use of inside and outside zone. The ultimate goal was to make defenders choose who they were going to defend and then make sure that was the wrong choice. He didn't use deception and even telegraphed the plays by alignment. That served his purpose because he wanted the defender to be decisive. It is a good example of having a coherent approach and understanding what you want and what you don't. The opposite of what Mack Brown did has last few years. For Kelly, QB runs were just a mechanism for punishing the decision. From what I can tell, Sarkisian looks at the defense as a whole. Instead of forcing a single player to commit to a specific ball carrier, his goal is to create space for backs and receivers and simple reads for the QB. QB runs just aren't that important for what he wants to accomplish.