Walter's tree has several flaws, judged by the classical style. To wit, there are crossing branches, the "sub trunks" don't have any taper, and there are some large still unhealed scars.
Don't get me wrong, it's a very nice tree. But it does not have the refinement shown in the Japanese trees.
Is it because Walter strives for a "natural look"? Or is it because he took the fast track, using branches that already existed on his stock and didn't grow out the branches? I don't know. I suspect it's more he used what he had and made the most of it, rather than spend the decades it takes to grow one out.
And there's the problem: it takes decades to grow these out properly.