My one complaint with Rose is that he doesn't use his JC background to his advantage. What happened to the Mike Halls/Terrel Lyday/Sylester Rivers/Keyna Young/Rashoun Brodus/Araujo/Luis Lemes type talents that BYU used to get from there? The answer is they don't even try. BYU only uses the JC schools when they have some kind of outlier event now, ala the Mike Lloyd situation where they have to get somebody late and all that's left is the Lamount Morgans/Archie Rose/ Logan Mags/Stephen Rogers of the world. Although Rogers is probably going to be decent.
I would fill half the team with JC guys if I coached at BYU.
I don't think BYU should have half the team from a JC.
They still need players that will play 4-5 years there, even if broken up by a mission.
It's tough to learn to play together in 2 years, because it is the 3rd and 4th years that most players will be really productive in a system.
If it's all JC guys, you lose that. BYU should use a couple of JC guys to give them some athleticism, and to fill in the gaps.