So what's it all add up to? It's hard to say. But me, I'd say this was a test... for Sam and Dean. And I think they did all right. Up against, Good, Evil, angels, devils, Destiny, and God himself, they made their own choice. They chose family. And, well... isn't that kinda the whole point? No doubt - endings are hard. But then again... nothing ever really ends, does it?