The Rose trade made New York a desirable place to play once again.
Rose recruited Noah who had multiple offers from other teams and probably could have gotten more money if that's all he cared about. Rose + coming back home to NYC = Noah becoming a Knick.
Noah recruited C. Lee to be our starting 2 guard at 12 mill per. Once again, Lee could have gotten a bigger contract on another team (he had multiple suitors for his skills and was heavily sought after). We got him at a bargain value because Noah convinced him to come, coupled with having Rose be his backcourt mate.
Jennings signed a ridiculously cheap one year, 5 million dollar deal to backup Rose in NY. I guarantee he could have gotten more years and more money to play a bigger role on another them; however, he saw Rose, Lee, Noah with KP and Melo--and saw a real opportunity to be on a good team in the East and be a key backup off the bench and spell Rose with spot starts. He understood he could revitalize his career on a one year deal playing behind Rose on a quality team.
My point: None of these FA signings would have been possible, especially at the contracts and money we signed them for, had it not been for the Rose trade and the trickle-down effect it caused. Teams can go anywhere in today's free agency; they usually go where they can make the most money and get the most guaranteed years in an inflated market, unless they see a good team and get recruited by players they respect, which was the case here. Welcome to the new NBA Free Agency, and Uncle Phil shrewdly used it to his advantage...