It all depends of what do you want to achieve in your build. Cognitomoto hub is fast and cheap solution. But I am trying to improve performance also. Lowering unsprung weight at front by ~1.5kg will noticably improve handling.
I don't know that I'd agree with that opinion about the hub. Could it be lighter, yes. It's not a particularly "fast" or "cheap" solution. A CNC 3-axis or 5-axis milling program is not much different in time to produce, given the right piece of machinery.
Then, there's the legal liability factor. How light does a part need to be for it to be usable, safe, and performance oriented on a 50-60hp motorcycle? Reducing a part's weight by 3# overall won't equate to tremendous handling improvement, especially when you factor the front end suspension changes. And, the total suspension and braking systems combined, probably are still lighter overall than stock dual brakes/forks, and much stiffer.
Your hub is elegant and it's similar to the RAD/Kineo approach. But standing alone in the abstract, it alone doesn't create a substantiated performance change. And you're running 36 spokes instead of 40, which also changes the weight and reduces stiffness. Trade-offs are everywhere in performance parts.
Sorry for the jack, Don.