Did you watch them play last year? Warner played nickel in lieu of bringing a 5th DB in and Bernard, especially early when he was healthy, had several INTs (including a highlight reel one hander, running stride for stride down the sidelines against you guys).
This game will come down to who can run the ball, stay ahead of the sticks, and keep the other team from teeing off on third down and creating turnovers/sacks. I put that advantage to BYU with their 4 returning OL against your thin DL and mediocre LBs.