I think that the fact that the class is a "Touring Car" class pretty much means you can never expect realistic looking bodies. For one thing, full scale touring car racing isn't all that big, especially not in the States. Not many people would recognize a "realistic" looking TC body any more than they would recognize any of the bodies that everyone uses now.
Our remote control touring cars are also not perfectly to scale, so making a realistic looking body for them is all the more difficult. It think it would be really cool if we had Ferrari, Porsche, Lamborghini, etc bodies, and that would definitely attract a lot of people and give them something to relate to, but if it's realistic touring car shells you want, I say we stick with what we have currently.
Josh