Blendspaces; flip edge between connected sample points?

I am basically trying to get the lines to be connected like on the blendspace on the left, but still be completely square like the blendspace on the right.

What I am trying to do is have an idle animation in the middle sample and blend poses in each corner.

Basically because of the way the edges are set up it stops blending at the blue points in my paintover.

So in the right blendpsace it stops blending the animation of the middle sample at 0.5, 0.5, instead of the desired 1, 1.

Red lines are current connections. I want green lines as connection.

So does anyone know if it is possible to flip edges or draw your own connections between samples? Instead or relying on workarounds like the BS on the left.

It looks like it has almost been a year since I posted this.

Its a bit of a nitpicky thing, I guess, but it would still be nice it was possible to actually define connections.

I would like to know if this is possible. It does matter. If a triangles orientation is longwise outward then it will blend with that point first as opposed to the local triangle radially.

The triangles in the interrior should form a diaomond shape not a gem shape
This changes the way the blendshape works, because sanpling a point within the top left interrior quadrant results in getting a blend between interrior animations and the outermost animation. This is not accurate to how it should be