Simply because he can ruin the life of the heel wrestlers because if you really think about it there are way more interesting heels in the WWE right now than there are faces. And also the heels are better mic workers than faces. Last night for instance that segment with Ziggler,Rhodes and Christian was good now imagine if that was lets say Kofi,Evan Bourne and Morrison. How boring would it be? I think he's better as a face for now.