Mists of Pandaria beta has been a bit of an interesting ride for affliction, I think. With demonology and destruction getting almost totally reworked, affliction supposedly remained mostly the same. The only thing that was supposed to change was no more Shadow Bolt.
But we got a nerf across the class to our self-healing, Soul Shards were more integrated into the only spec that retained them, and our DoTs finally got some buffs in their damage while Haunt got nerfed in its debuff power. Haunt isn't meant to be 100%? That changes everything for us aff 'locks. But is this a good change?