There are over 300 D1 teams, plus DII, plus NAIA, plus juco...Less than 2% of college basketball players make it to the NBA (60 players or so drafted, 1/3 usually foreigners, another 1/4 never see an actual NBA game). Without a doubt it's the toughest sports league in the world to break into.
A devout LDS family that had to chose between BYU and Utah now has an easier choice, bottom line. However, Duke plays on Sundays, didn't change Jabari going to Duke... (but we're comparing Utah and BYU)
You really would have to take a close look at Pac 12 teams (or any teams that play on sunday for that matter) that have LDS players on them, that quite likely served a mission (in my estimation if the Sabbath is a deal breaker, then most likely they also would serve missions). Exclude those that BYU didn't want or offer and then I think you come down to a small sample. It's that small sample we're talking about... another reason why the NBA shouldn't be a part of the argument. How many temple reccomend holding players you think there are in the league right now? 1-2? I can't imagine it's many more.
The sabbath play thing affects people and families, but for the most part, they're people and families that already are considering BYU... Utah was the other potential destination, even if BYU offered. Now Utah can't put no sabbath play or practice on the table. It's to our advantage, but only with a very few rare families and players, and the majority of those guys, Dave Rose is getting anyhow.