Deron Williams is easy to replace.
Jerry Sloan is irreplaceable.
The end.
Are you f'n kidding me? One thing is perfectly clear and absolutely non debatable--you don't win in the NBA without superstars. God himself could be your coach and you still wouldn't win without superstars.
If Deron is not on this team, the Jazz are a sub-500 team and completely irrelevant. He has absolutely carried the team this year. The Jazz's problem is that it only has a single superstar. Neither Milsap or Jefferson are in this category; both are good players, but not at the elite level to take the team to the promised land.
Hypothetically, if it came down to Deron or Sloan, only a fool, or someone blinded by loyalty, would take Sloan. Without Deron, this team is the Utah version of the Milwaukee Bucks, Charlotte Bobcats, New Jersey Nets, Golden State Warriors, or every other non-factor team out there lacking legit superstars. If in fact Deron's guilty of what he's been accused of; yeah, it disappoints me, but damned if I don't want him out there leading the team, even if it means Corbin on the bench instead of Sloan.
More so than any other sport, the NBA is star-driven. Coaches do matter, but in the end, talent is what really matters most, and the teams that have the most talent win. It really is almost that simple.