Cool erik, thanks. Those were some of the things I was thinking too. Like if you did it that way, there would be less to plane off of the back (fig 3) . I was thinking of just angling down the front neck pickup area of the body blank on a table saw (Fig 2), thus not needing to plane.
I've always been confused by planing down and leveling a neck through done like Fig 1. I get the theory behind it but figure you'd always be left with a carved top style or like a dip where the neck pickup would sit? Unless like you said, put it through a planer, which I don't have access to.