> I'd argue the Heat might not be as good if they had 5 LeBrons, either. After you get people in the right positions to contribute via their specializations, the next most important is -- by far -- to encourage mentorship and active sharing within the team.

A similar thing happened in football (soccer), when the Real Madrid of the early 2000s decided to let go Claude Makélélé, a defensive midfielder who was in charge of all the "grunt work". For the following 3 years Real didn't win anything, even though they had Zidane, Ronaldo, Figo and Beckham among others.