With really high, like over 50% expo, it seems like when you reach a certain movement on the stick, you all of a sudden have a lot more control movement and response. That can make some maneuvers difficult to do smoothly. I like to use 50% or less exponential on my planes. If you feel like you need more than 50% expo on a control because it is too sensitive, then either reduce the throw or use dual or triple rates.

(Just my opinion...)

AV8TOR