I don't have the resources or talent to create this, but it would be a great addon to add a sound effect that would simulate turbulance. Here is the deal, when you have turbulance selected in the weather parameters the plane bounces up and down and moves side to side, but there is now sound to go with it. I have been in a lot of turbulance in my time and the plane creaks and shutters. Of course depending on how rough it is.
Anyway, just a thought for those talented FS individuals maybe to look into.