think he goes to Duke for a year. After a year at Duke playing in the ACC he will know if he is NBA material. If he is then he goes into the draft the next year. If he does not excel as a freshman then a mission makes more sense and he can have a great college career after that and then maybe the NBA. If he goes right away on a mission then making the NBA is unlikely. Just too hard to recover the skill set at an NBA level after 2 years. I heard a conversation that there has never been a guard out of Utah play in the NBA.
The Jacksons are great people and very committed. It has been proven you can go on a mission and have a great college career. It has not been proven you can do it in the NBA as a guard. You also lose 2 years of income for a career that may only last 2 - 10 years.
I think Duke or similar school makes more sense for Frank than it did Jabari. Jabari was going to the NBA after one year as a top 5 pick no matter what. He could have gone to BYU and still got drafted in the same spot. Frank still needs to prove himself at an elite level to be worthy of a top NBA draft pick. Right now he is borderline. Dominating the WCC will not do that for Frank. I love BYU and wish he would come but can understand the reasons for going somewhere else. The part that is not speculation is I have heard if BYU were in a major conference he would be coming. In this case the WCC definitely hurts recruiting.