The three biggest desires I have for my kids in college are a stronger testimony, a mission, and a great spouse
I tend to believe that all three of those things are all more likely at BYU and the fact that you can get a great education for pennies in the process doesn't hurt. I'll be encouraging, although certainly not forcing, all of my kids to attend BYU.
The bigger moral dilemma for me would be if one of my kids didn't get into BYU and was debating BYU-I or a non-BYU school.