Someone correct me if I’m wrong, but its my understanding that if you were to rig what you have and move the head, you’d probably see the deformation get awkward around your longer quads because they’re going to collapse longways.
I think it makes more sense to kind of assume the triangulation of all quads. If the triangles of a quad would be heavily skewed, you can expect that skewing to be a potential problem in a UV or deformation.
That’s how I think of it anyway.