Chris,
your comment about getting the hang of bottoms had me looking into the form as we generally refer to the bottom of the bowl, and outside is the base or foot.
After that you tell George that the base has a very small area it settles on, it must be because even from the inverted photo, I can't make out the area (base) you refer to. Is it really stable on it or does it move/ rock while settlingt.
By the by, there is nothing wrong with the finish and the form is good as well.
I will say that the one thing with natural edge forms is that the thickness is even, at least as far down as just past the lowest part of the edge, so that it looks balanced. If it gets thicker at any point the illusion can be spoilt.