After the first two years of the one-and-done era of college basketball brought such superstar talents as Kevin Durant, Derrick Rose and Russell Westbrook into the league, the one constant in subsequent drafts has been complaining. With little data to evaluate unpolished prospects, league executives and scouts often whine and pan the draft as weak, leading teams to make pre-emptive decisions to avoid possibly blundering by investing in an expensive, high lottery pick.