I liked this season finale, granted, for me it wasn't as emotionally intense as other season finales have been, but what it lacked in intensity, it totally made up for in emotional satisfaction. There were awesome brother moments, awesome Sam moments, awesome Dean moments and of course there's Crowley. He is delicious. Most importantly it was a fitting end to a story that began all the way in Season 5.
If you all don't mind, I would like to elaborate on the emotional satisfaction I felt by the hour's end. I have posted for years now how I had always believed that God had not abandoned his creation, but had been around this entire time. I've also postulated time and time again, ever since learning that Heaven commanded Sam and Dean be born in My Bloody Valentine, that God not only was still around, but that he created the Winchesters as a gift to all of humanity. While God was no longer hands on, he still gave the world Sam and Dean and has often saved them and provided for them when they needed it the most. God created angels. He created Castiel, the apparent spanner in the works, yet who turned out to be an ally to the Winchesters, betraying the angels, to help Sam and Dean stop the Apocalypse. Cas has been the Winchester's guardian angel, and if one were to think about it, it was Chuck/God who created Castiel in the first place. The square peg in the round hole.