As for the Jazz, trading Mitchell could create a drought heretofore never experienced in Utah. Jazz Nation has to be wondering why the organization is so eager to trade Mitchell.
It seems Utah is in a pretty good place with its current available draft picks and salary cap space. Mitchell is a player you can build around and the Jazz could at least begin the season with some stability.
Mitchell's stock should not decrease as he in the prime of his career with plenty of NBA player growth at his disposal. If a trade is completed between the Jazz and Knicks regarding Mitchell, Utah will surely receive more draft picks, and that's great.
But at some point, the Jazz will have to get ready for the NBA season and the long war of attrition that it is. With Mitchell, you have an NBA All-Star to help win those battles.
If Mitchell is traded, when would Utah ink its next NBA All-Star? This is why a Mitchell trade between the Jazz and Kicks helps nothing for either team.