I wouldn't mind a setup where there was actually a single pipe running to the back, then splitting off to each side, it's not really any different than the stock setup with a dual tip muffler, it's just each tip is on an opposite side of the car.
I wouldn't bother making it happen, but it could look nice, and I don't get people who put the idea down as stupid, etc, when it's basically exactly how stock was, and how the HKS setup is (sport and turbo).