I believe he addressed this question a couple years ago. If I remember correctly, he said that as he builds the program, offense was first, then defense. Last year he focused on man D and improved the defense significantly. I believe Saul teaches and expects flawless fundamentals before moving on to something else. Now that he spent a year mastering Man D, I would expect to see him throw in some more defenses this year.
Kinda the same thought process as teaching math. You have to understand addition and subtraction before you can learn multiplication and division.
Everybody evolves, life is all about progression. Whenever we played athletic team like Marchall, Iona and Buffalo, we gave up a lot of points. We even lost to some 200+ rpi teams because of our inability to score at the end of games and our inability to stop people. We did not get a lot of steals or blocks, we are not a defensive power. Zones are illegal in the NBA, because zones would create very low scoring games, if you allow professionals run a zone, it is sort of like aluminum bats in colllege baseball. Saul should take advantage of rules that benefit our team, we should run zone when we can't match up. Buffalo could have hung 100 plus on us, they missed so many easy shots. Are we saying that Saul is a bad coach or that you should stop washhing his car or that we deserve the car washes? No, wash away, gaze away, keep his written directions on waxing the car in protective glass and pull them out when you need a pick me up. We are just making an observation, we believe that at certain times, running a zone may help us.