Nice little interview with Breaking Bad writer Peter Gould about the reasoning behind events in 'Granite State' and small hints about what to expect in the final.
https://insidetv.ew.com/2013/09/23/breaking-bad-granite-state-writer/
I found this comment interesting...
The way I see it is that Heisenberg is gone. He keeps trying to kind of evoke the ghost of Heisenberg, the thrill of feeling powerful, and it’s not there. It’s gone. It died when Hank died. It’s just not there. It died when he saw baby Holly. And then in the end, what is happening in my mind, and obviously we’re leaving it up to the audience to some extent, in my mind, what’s happening is he’s becoming something new. And it’s not Walter White; It’s not Heisenberg; it’s something new. And that’s what I think Dave Porter picked up on when he had that great variation on the Breaking Bad theme at the end. Dave and I both agree he’s sort of, in this episode, he’s becoming what he’s going to become, and we’ll find out what that is in the next episode.
They better not puss out