I think the Rogue body shape is perfect for extended range basses. I play a 36 scale custom with the Rogue shape and I have absolutely no balancing issues at all and I love the taughtness of the B string.
When I have my 6 string built it will be 36 scale, 5A maple top & back, series II, with a custom body shape blending the Standard Point and Rogue bodies.
BTW, I've now had the opportunity to play my new Brown Bass. I love it! And I find no balancing issues with it as well. In fact I find it even more comfortable to play standing than sitting. I wear the strap up high and rest my right forearm on the body and I don't have to support the neck with my left hand at all. This, together with the short scale, the satin finish on the neck and the thin neck width gives this bass a supper fast neck. Wow!
Kevin