I think Roy is finding a new strategy to help buffer their troubles in recruiting. He's basically just signing 3 and 4-star big men, because he would rather them stay 4 years, and they're all going to be good because UNC develops bigs at an incredible pace- an he's also just signing shooters like Kenny Williams, Cam Johnson (that fell into their lap, but still) Brandon Robinson and Platek.
By doing this he has competent big men which will struggle initially but when they turn the corner, he will have beasts for 2-3 seasons from their sophomore/junior through senior seasons, shooters to hit open shots, and then he just has to have 2-3 guys that are the next "cut above" like a Justin Jackson, Berry, etc.
Coby White is definitely a worry. His freshman season doesn't worry me, but the potential of him being a 3 year guy is annoying.
It's a good strategy, but it banks on a couple of things A.) That each player will develop. For example, if Seventh Woods, Brandon Robinson, Platek and Hufman never really develop these are 4 essentially wasted scholarships. B.) That the guys he is banking on to be a multi-year guy like Coby White, actually come back. These players leaving early, hurt UNC so bad. This killed UNC when Tony Bradley left early- Roy and staff were 100% banking on Bradley returning for his sophomore season. If you get enough of these, especially in succession, it kills them long term.
Tony Bradley is a perfect example of the fine line Roy is playing with that strategy- Bradley was probably the difference between a 4-5 loss, 1 seed, Final Four caliber team and a 10 loss team that lost by 20 in the 2nd round.
What he's doing is building a very solid foundation/infrastructure with guys like Kenny Williams, Luke Maye, Garrison Brooks, Platek, etc, but he needs the Tony Bradleys and Coby White's to desperately stay multi-years otherwise they just simply do not have enough firepower to compete for a National Title.
This is why UNC cannot compete next season for a title- they won't have enough firepower. They didn't have enough firepower this year, and they lose their two best players in Pinson and Berry and aren't bringing in anyone that will adequately replace them.