Personally, I don't think K is all that comfortable with the one and done crap but he knows he is being paid to bring the best talent available to Duke. Unfortunately, the one and dones are the best talent and are the kids that will put up with some of K's uniqueness for one year.
The way the Duke team has played in the past 3-5 years shows the one and done syndrome - a lack of discipline on offense and the inability to play a good man to man that allows more disciplined, great outside shooting teams to upset them. Kansas beat Duke because they had smarter and older players. The only Dukie to keep them in that game was their only contributing senior - Allen.
I was never impressed with K's game tactics and he relied on intimidating the officials to get by in close games.
I am not saying he is not a good or successful coach but I would take JC and even Jay Wright over him, JMHO