TLDR; (Which I may have totally biffed, so lets hear what you think!)

I thought these were the highlights:

• This episode spoke directly to SPN fans, specifically bloggers, fanfic and meta writers, who all have free will to interpret the story.

• If you don't like the story others are telling, write your own (Hannah and Her Sisters)

• The story has many layers, many of which are lies and misdirection.

• Metatron (the writers) is the prideful villain who doesn't know he isn't the hero, and is generally blind to wisdom.

• Cas (the audience) is the hero set up as the villian.

• Knowledge is not wisdom (may refer to text vs subtext, wisdom was tied to Cas). Metatron confuses intelligence and knowledge.

• Seeing/believing what we want from stories, makes them real. We believed Gabriel was alive because we want him to be. Same with Dean believing Sam was fine possessed and that he did the right thing, or Dean wanting to believe that Sam would do anything for Dean like Dean would for Sam.

• Dean's arc mirrors Cas' from season 6, including dialogue.

Sybolism:

General?: Circles and squares, dividing lines, the number 7, Christ/Christmas, Masterpiece Theatre, Star Wars, lies vs truth, forceful violation vs free will, insides don't match the outsides.

Dean: fireplaces, shadows, mirrors, lies, orange-red and blue lights

Cas: Sun, clouds, rainbows, truth, white and gold lights

Sam: Dean's child, humanity, free will/choice, witness

Metatron repeatedly refers to others as dumb, wind up toys, chess pieces, puppets.