Use the DJI Go app to adjust the rudder's (yaw's) exponential on the stick, for less sensitivity at center, and for more at the extreme movements (flatten out the horizontal line at the center of the stick graph).
That will allow you to make much finer/slower yaw movements around center stick with increasing yaw movement as you move the yaw stick farther to the left/right.
You are basically swapping less sensitivity at center stick for progressively more stick control as you move the sticks farther, in an exponentially (non-linear) manner.
The DJI version of expo is not as cool as what you would find in something like a Futaba radio, but it's much better than a poke in the eye with a blunt stick.
BTW: This is 'not' the gain control in the app.
You can also adjust the gain to increase or decrease the feel of the stick, but in a linear (non-exponential) way.