THis is my exact recommendation.
Most people don't use 3D throws when they fly unless they are doing 3D maneuvers. Why waste the precision of the servo just to say you can move your control surfaces a ton!
ORIGINAL: siclick33
In which case, why use dual rates?
Why not de-sensitive the controls by reducing the throws and add a little expo?
Now there are no switches to throw in flight and you can concentrate on flying the model.
Just my own personal opinion. (and quite rightly in this hobby, opinions do vary)