15 sec CD Soul Swap is mostly a PVP nerf. I guess it hurt 5man Locks who carried their dots with them for trash. The 15s helps so you don't clip BoA as much on V&T.

I think the major problem with Affliction right now is that Soul Swap doesn't carry over Haunt or Shadow's Embrace. Asking us to apply 3 stacks of SE, in a pvp environment is laughable.