I would agree with fd, it's harder to find and recruit jucos in 3.0. Previously, it wasn't uncommon to see guys using the "superclass" method to replace 6 outgoing seniors with 6 pretty solid juco juniors, and make another run. It would be harder to pull off now, I would think, unless you are in a advantageous geographical spot, and can easily draw from a big local pool. Cal, Tex, NY, FL are the big juco producers that I know of. It's very hard to fully scout, and then effectively recruit in all of them now.
In 3.0, I see the big value of juco players for rebuilding programs, especially in helping you get your class structure set the way you want it. They can fill in gaps, they turn around fast. So even if they don't fill potential, or fully learn your O/D, they can be assets off the bench, and they don't take up a roster spot for 2 extra years to get useful while you try to hide them. With CSUN, I was looking at 10 openings last season, and of course you only get resources adjusted to 6, and can only sign 6 players in a class. So I focused on jucos. I could do that, being in a juco-rich area. They can be good placeholders.