OK, perhaps a little hyperbole, but there are other fancy pedal boxes out there. The brake specialist said they were sweet and are gentler on the cylinders since they push straight. Lol. Perhaps money could be better spent.
I was also told (please no eye-rolling just yet) that there is the three inch rule for calipers and wheels. A "good" 12" rotor and caliper should fit in a 15 inch wheel. However, I could not find a 17" wheel for my 14" BBK due to offset issues and cost.
The comment about auto X was about the issue of mass of a larger rotor. Not only unsprung weight but the rotational mass and the gyroscopic resistance effect. I think there is a technical automotive term for it. Quick transitions would see more resistance to turning, the larger the rotor and the faster it is spinning. When I asked about the trade offs of large brakes he said it was worth it in road racing in most instances.