Last year, BYU allowed opponents to make 32.4% of their 3 point attempts and attempt a 3 pointer on 38.9% of their total FGA.

This year, BYU is allowing opponents to make 32.1% of their 3 point attempts and attempt a 3 pointer on 36.6% of their total FGA.

So that nets out to....

0.3% improvement on 3pt% defense
2.3% improvement on the 3PA ratio

How much does 2.3% equate to? 1.3 3PA per game, using this season's opponents total FGA. Just one shot. So the accuracy is the same and the 3 point attempts is essentially the same.

Perception vs Reality.