It would be nice to have an indicator for the deadzones when mouse joystick is toggled.
I suggest that if implemented, it could aslo have a transparency slider allowing to change the opacity of the deadzone indicator in game.
This suggestion by Activatewindows is similar to mine but i don't think it's quite the same: Mouse joystick center icon.
(Sorry in advance for the low quality of the edits (i'm not home and i don't have editing software in this pc aside from paint.)
Something like a circle could work, but i think it would look weird when you have different deadzones for pitch and roll.
Or something like a cross could be done to avoid having an oval shaped deadzone indicator.
A diamond could be the solution combining the best of both ideas.