In response to that question, another question:
When was the last time Duke won a NC without a National Player of the Year?
Well, it was Battier in 2001, and Laettner in 1992. After the past two years it seems like it's becoming likely that one of these on-and-done guys is always gonna make a strong case for National POY. I'm not saying a senior will never be POY again, but it just seems that every year these frosh are more and more ready to play. Carmelo seemed like an anomoly to me at the time, but maybe he was just an early preview of the future of college basketball. I'm not saying this is what I believe for sure, but just something to consider. I don't have a problem with a one-and-done guy at Duke. Deng worked out beautifully, and we haven't been to a Final Four since we had a one-and-done guy.
As far as one-and-done guys being "me, me, me", I don't think that's the case. Magette and Marvin Williams were 6th men. Brandan Wright was not getting too many shots a game and actually made Carolina into a really good team last year, not a one man show. I think if Coach K had a guy like Durant or Beasley, he would get the ball into that guy's hands early and often in order to win games, not because the player was a prima donna.