They kept their starters out there and continued to push the ball but by the middle of the 3rd quarter BYU had a 3 possession lead so he said they were looking at how many possessions would be left in the game and being run heavy (still with passes sprinkled in) was the obvious call to continue to dominate the time of possession and limit how many possessions UCF had so they couldn't have enough possessions to even get a chance to score enough to come back.
They made the right call IMO