I may be wrong about this, but Kennard strikes me as someone who could have had an absolutely spectacular college career, but who may be fairly limited at the next level. Don't get me wrong, I am very impressed by his game. I don't know how well it will translate in the next level.
You can look at certain players historically. The obvious one is Laettner. He had perhaps the greatest college career that anyone ever had. Imagine him as a one and done. He would have still had a long run in the NBA and made his fortune, but he never would have had the astounding college experience.
One and done has diminished the college game in so many ways. When the first 6 or more selections in the NBA draft are freshmen, it undoes the traditional skills of college coaches --to build a team over a series of years and to develop talent. We are currently suffering from the recruiting wars for players that will stay for one year. Imagine last year with a senior point guard. Imagine this coming year with an accomplished future-pro Junior two guard.
This board has raked the coaching staff over the coals because of missed recruiting targets. But the misses would only be staying for one year. Every program is suffering over this --even Duke, who took our targeted small forward away from us because they got caught short.
Can you image Kennard as a four year college player? He would be breath-taking. It is a loss to Duke, but also to all of us who are fans of the college game, that no one gets to see what might have been.