I really hope Dean being back now will have a good influence on Sam, because the Campbells are obviously a bad one.

I like them addressing how Dean would become like John when that protective and under stress
I really liked that, too, and I totally agree that he did kinda act like John, letting himself be driven by his fear and paranoia. A lot of people seemed to have issues with that, I think, but I definitely think it was true. And he wasn't doing Lisa or Ben any good...