That's not very encouraging if true. I've seen a number of videos that specifically mention this issue and the video footage would suggest the control is not as smooth as I'd like.
OTH, if the
Mavic Air 2 like the Mini have always used the Fly app and it's never had control over the sticks sensitivity I have to ask what you mean by "when we had control over the yaw expo". I have no experience with this app as I used the Go app for the Inspire 1 Pro and the Go 4 app for the
P4P and both had controls for stick sensitivity. It's possible, I guess, that DJI, having positioned the
Air 2 in the beginner range, has decided to prevent newbies from making a mess of things with such controls -- if that's the case then we can expect the Fly app will never have control of the stick sensitivity. Sadly, this, along with the fixed aperture and focus camera, is making it less likely I'll get the
Air 2.
Brian