Wait you mean to tell me that shelling out a long-term, high-dollar contract was a BAD idea?! You don't say!
Yes, plus the fact that while Soriano's accumulated stats look impressive, he refuses to allow teams to leverage his abilities by batting him in the middle of the order. He pulls a Manny if you bat him anywhere but leadoff, but notice his steals are down from 41 to 19, 19 since being dealt to the Cubs.
He's still productive, but missed nearly a third of the season and costs too much, and isn't fully leveraged.