They have been looking for a low post threat. Perkins or Ibaka ain't got it. Noah can anchor a defense while get you some points from the post. He is a consistant double double guy. He averaged 15/9 last post season.
They need to Trade Dwight now before he walks out on them. In this Trade they lose Hedo's bad contract and gain a good core to move forward.
They want to contend. Rose is likely not to come back the same guy so they need another super star. They have been shopping Deng for a while and now Noah so why not go for the best Center in the League instead of a rookie?