Keeps It tidy
Hates Messi
He was fantastic then and that was peak of his value. He's never going to be able to stay fit.
It's like Chelsea selling Mata when his value was still high. Rafael has always had poor fitness and been a tad rash defensively.
It seemed like he got over his injury issues in 12-13. And Rafel's aggression is more of an asset than a weakness.