I'm sure

- I have been flying pretty much everything RC for nearly 30 years and have four transmitters sitting in front of me at the moment.
Expo and Dual rates and dual throw are completely different things. The only function for expo is to desensitize the mid stick position and give the throw a non linear curve. This does not affect the rate of output or the maximum travel of the stick which will still be at 100%. It will however alter the 'feel' of the input which will be sloppy around zero (mid stick) and will exponentially increase as an input is applied on the axis the expo has been set on. You are kind of correct in that the inputs around mid stick will be dumbed down but the rest of the travel will be the same.
Hope that makes sense.
For true 'slowing down' of the inputs you would need dual rates which are programmable and dual throw would be advantageous to limit the output to say 70% at full throw but these features are not available on the Inspire.