Inboard calipers
 

Why wouldn't Toyota/Subaru put the brake calipers on the inboard side of the rotors to keep weight more centralized on the cars? I didn't notice this until this weekend, but I was a little disappointed in them for not implementing such a simple weight relocation.
Does anyone know of any disadvantages of an inboard mounting of the calipers?

I can only assume cost or suspension packaging was the determining factor for the standard caliper location decided upon. Remember, they already had to flipflop some suspension components to get everything to fit under those fenders and allow room for more tire.

It's unsprung weight so it doesn't affect the front/rear weight balance of the car. I think in one of the reviews they said the steering rack wouldn't fit in front of the engine so they had to put it behind. Steering rack location almost always determines the location of the brake calipers.

Because the steering arm is on the rear of the upright, because the steering rack is behind the front wheels, because the engine is (mostly) behind the front axle centerline.

Caliper position has a fairly negligible effect on polar moment of inertia. Moving ~8 lbs of calipers ~8 inches on a 2700lb 166inch long car isn't going to do much, and it certainly isn't worth worrying about.

^^ what they said.