I just wasn't a fan..
I liked Sam's potrayal of going crazy
That girl was fine, i guess in a way if you want to find deeper meaning in it you can see how hunting helps him find purpose or something.
I am not sure if the writers were ever planning to bring Cas back but in anycase they backed themselves in a corner. They had to do amnesiac Cas which is just such a huge cliche.
I like Meg too but her entry feels forced to me.
While i think needed, the character entries are weak.
The end idk, he absorbs part of the torture? What? Is that how crazy works in the soul?