Washington, Wisconsin, Cal, Arizona, Utah, Boise St to all be big national games this year. Those are name teams that people will pay attention to nationally. Outside of BSU, there is nobody that anyone will pay attention to nationally in the MWC. Of course, BYU has to do their part and actually be worth watching
All of this is besides the point though. You're moving the goal posts. The point is BYU's schedules are better and more interesting than USU's schedules. What you want to define as a big game is irrelevant to that point.