as a consumer, i'm all for these. it's a great product. however, objectively, i wonder if it'll be profitable. what you're talking about is basically the same as the twr racing kit, a kit they've decided to stop making. the only difference is that it won't be a two piece rotor.
good - you can use your e-brake because the hat will be steel
bad - not two piece
maybe it could be sold for less than the twr racing kit? why would this kit be more profitable than the twr racing one? sorry, i'm kind of just blurting out what i'm thinking. i think that the group of people who wants this kit is still small. brembo rear calipers are pricey and not easy to come by. i think a lot of people interested in upgrading their brakes will just go the way of the red wrx two pot.