30116pb03, Panel 14x14x2.667 with Millennium Falcon Pattern

[Travis Cobbs]

I guess that makes sense. However, with non-rectangular quads, a "better" split can be determined (the one where the seam line between the two triangles is shortest). For concave quads, there's only one valid way to split. Of course, if the quad is significantly warped (non planar), then perhaps an automatic splitting algorithm isn't such a good idea.