I understand the concept of slowing things down to let the defense get rested. Theoretically the slower pace also limits injuries due to a significantly reduced number of snaps on both side of the ball.
What don't I like about it?
1. The limited number of offensive possessions makes every 3-and-out, and every turnover excruciating. When you're averaging 1.8 possessions per quarter, any failure to score puts the team at a significant disadvantage. Maybe that's fine if the D is getting stops and turnovers, but when they aren't, bad things happen.
2. BYU's offense just plays better at a higher tempo. It's obvious - the 2-minute drill this season has been fun to watch.
3. It limits scoring and produces games with closer scores than BYU's overall performance would merit. This is harmful for BYU, who winds up playing more than their share of late-night games east coast AP voters don't see. It's hard to impress someone who merely checks the final score of the game and sees a differential of 5-9 points against mediocre competition. In the expanded CFP era, we've already seen margin of victory play a significant role.
4. Finally, the three-legged-turtle pace just does not entertain. BYU's identity going back to the late 70s is a dynamic, high scoring offense. It should be exciting and draw viewers who want to see the scoreboard lit up.