I've written up some thoughts on Castiel's arc at the end of S6. I’ve spent a lot of time thinking about what happens to Castiel at the end of season 6. The conclusion that I’ve come to is, I understand what motivates everyone during that arc. I think there’s wrong on all sides, but that no one person can be solely blamed.
Comments/discussion encouraged! No real spoilers for unaired episodes (explained more clearly in the post).