I think you will have to look at it several ways:
1) First and foremost, this saves money. Salaries got cut by about $1.5M so that's about $2M of savings factoring in the luxury tax payments. On top of it, the Nets gives us $3M. So this trade saves us $5M as an organization but fans like us don't really care;
2) Where will this Jazz team stand with D-Will leading the team? He didn't do what Lebron or Carmelo did, but we all know he is frustrated that he is out of his comfort zone without Boozer and had to get used to new teammates. He will easily leave for another team. Then it's the way he deals with Sloan. Clearly, after 23 years, the management has a strong relationship with Sloan. They won't admit it, but we can all guess D-Will was a big reason Sloan AND Phil Johnson resigned. It is not hard to understand that the front office starts to dislike D-Will because of this.
3) This is probably the best package we can hope for. Harris is a solid point guard, who can't compare to D-Will but he can at least fill the shoes for now. Favors is the main piece and with the right investment on him, he can develop into a great player. The draft picks, given the Jazz FO draft history, might better off serve as trade assets than actual picks they make, but our future is bright.
Not saying I love to see Deron go... I am a big fan with 2 of his jerseys in my closet. But as a JAZZ FAN, you have to look to the bright side and move on and understand the Jazz actually did not do so bad.