I did enjoy this episode, and I was pleasantly surprised by the ending. So now Cas is gone, Jack is gone, it's all going to boil down to Sam and Dean at the end which is exactly as it should be.

That said, I'm more than a little apprehensive about next week's episode because I know it's been said many times, on the inside and on the outside that Supernatural couldn't have a happy ending...

I just hope that whatever happens, and as others have said, that there is enough leeway left to give us hope for a reboot or movie!