Have you considered the control range of the pitch mechanism ?
Unless you have an autofeather, autocoarsen, NTS, etc system operating in cruise flight, you are more likely to end up with a significant drag load on the failed side rather than, as you appear to be suggesting, a magical low drag system ? Typical end result is yaw, roll, and a really good view of the ground below - all of which probably might alert the pilot to an impending problem.