Acoustic Guitar Construction

I sure can't see it as an improvement over our normal method of x-jointing, which does not seem to have a weakness though there is (as always in luthiery) a difference of opinion on capping the joint.

Well, I cannot see the advantage too.
Why making a side of a joint twice as strong as the other side?
Somogyi called the X the most important joint in the guitar, so why would someone making it weak?
The best x-braced guitars are made with a symmetrical strong X-joint. Capped or cloth-glued.
Why leaving that design? IMO: marketing!
2ct
Herman

Herman - what do you think of the R. Taylor bracing picture? Or is that the one you are talking about?

Well, I think it is experimental and easier to make. The forces to the top try to widen the X- angle.
By feathering the joint structures, like here, the X is not tight as we know it. This stresses the top in that area, and not the braces. Still think it is experimental and a try to be different.
In My opinion: If you want to losen the X, make it tinyer.

You make your point well, H!