i liked this epsiode but i only like certain parts. as a whole i found it very boring and a waste of my time this didnt really shade any light on anything new.
But your comment can be countered with "Or did it?"
Did anyone see the real subtle clue, which I actually think is really important to pay attention to. Now I could be wrong and everything, but what about the scared tattoo girl that was locked up that Dean noticed in the beginning of when they entered the place, and Crowley asked her "Now are going to tell me where Daddy is?"
I think that girl plays a crucial element to the plot in some way (such as maybe her "father" is an alpha that know where Purgatory is and is willing to reveal its location), otherwise that's one hell of a red herring.