He's Dead, Jim
Member
The finale was surprising in how non-complex it was, which is atypical of Breaking Bad. But that line when he says to Skylar, "I was alive," I think sort of signifies that he essentially died in Ozymandias, and at this point he's just tying up loose ends. The vindication, the moral arc of the story, etc. all happened in Ozymandias, and this was almost like A Christmas Carol kind of scenario where Walt is neither alive nor dead in any real way.