Later firmware versions will give more expo control over all the channels (hopefully) but this will only have the effect of desensitizing at mid stick.
What you want to achieve is very easily done with more advanced RC transmitters using dual rates but is beyond the INSPIRE's current capabilities.
For now, I'm afraid the only way to get a slow yaw or slow flight is to hone your stick skills.
Maybe if you are using your thumbs to fly, try pinching the sticks between thumb and forefinger which gives finer motor muscle control.
It will come with practice......I promise.
I have read in earlier(January) posts that it is possible to adjust the 'Stick Expo Curve'.
But I can't seem to find that adjustment or instructions in the manual on how to adjust it. can anyone tell me where to find it or it's still an adjustment that can be made?