Yes, that's what I think, too. The comic's style simply gradually changed into more proportional. It might be intentional, but I don't think so.
Nope, I think it was representational of Parson's initial unwillingness to accept the reality of Erfworld. In the beginning, it was a delusion, an hallucination, a delusion. It was obviously some kind of wish fulfillment fantasy, from his perspective. But that perspective, and reality itself, changed as he grew to accept it as a valid reality, and thus reality itself changed. Which raises some very interesting existential questions . . .
The Truth Will Set You Free. But First, It Will Piss You Off.