There is no car that beats the Corvette's performance. Chevy puts the best performance they can manage and price it at the best value. People who are interested in the Corvette do not care about the interior.
People who buy the GT3 RS don't care about the cloth door handles.
You guys make it sound like it is hard to make a nice interior. All they have to do is charge more money, but then it would put it's cost close to the Europeans --then their would be a questions asked why would anyone spend that much on a Chevy.