Does your design do anything in the steering game such as reduce bump steer?
I think I read somewhere that his shortened arm and relocated outer tie rod hole does do this....but I can't remember where I read that now.
As far as camber gain goes....its not only LCA/UCA lengths and angles. As a random example: A shorter spindle will also affect roll center:
A shorter spindle will effectively move the outer pivot points of the spindle...pulling down the outer pivot of the UCA, which to some degree undoes some of the effect of a shelby drop(or looking at it a different way allows for more of a shelby drop than the standard 1"). So without re-doing the shelby drop with only the change of a shorter spindle your roll center would effectively be raised. Of course...there are other ways to get around that, such as using a taller ball joint stud, which would effectively keep your outer pivot points where they were...but everything you change effects something else and has to be considered.
Beyond that, spindle height isn't the only thing that affects camber gain under cornering either. SAI for example does as well, an increased SAI will help high speed stability and return-to-center...but at the same time affects the camber as you turn the car, reducing negative camber on the inside tire and increasing positive camber on the outside tire(good for the outside tire, bad for the inside tire), but that's not the end of the story either, because increasing caster can fight this tendency as well and you end up with a rule of thumb that you want 1/2 the caster as your SAI. IE, 4 degrees of caster for 8 degrees of SAI, 5 degrees of caster for 10 degrees of SAI, etc.
Anyway, the point is that none of this exists in a vacuum, there is always more than one variable acting on a car's suspension so what might work perfectly for one car may be completely different for another leading to 2(or more) wildly different approaches that both work.
I am certainly no suspension expert and I have done a LOT of reading on the various factors included, but I am left with the feeling I know just enough to understand I don't know much of anything regarding suspension design and that if I can think of changes to the roll center, etc, there is certainly something else I am missing on a given design that might counteract such a change....or that such a change might not even be bad.