I really didn't like this one. The main three reasons being:
1. I always imagined the SPN world was the same as ours - like, I know it's fictional but it's not a fantasy one. I don't know if that makes sense. The intro of a fictional president ruins that.
2. Nephilim storyline reads like my own bad fanfiction, which I actually did write years ago.
3. That bullshit magic thing that solved the Lucifer problem better have been BS because if not, that's the stupidest thing on the show so far.

^ Maybe they read to much Fanfic.

^ Haha, maybe? :)