You can't rely on Porsche engineering, they can't even put the engine in the right end of the car.

As for dust evacuation, most pads have slots cut at the centerline to aid that, and while it may build up, is it really a concern on a street driven car? An SUV at that? Even for race applications, i've found race cars with drilled/slotted brakes (except cars running drilled rotors in the rain) to be few and far between. Just my personal experience though.