What exactly do you guys recalibrate after each firmware upgrade?

Nothing on the Mavic..

For IMU only calibrate is the App says so

For Compass, only when the app says so or you move 100+ miles form a normal flying area.

For visual sensors, again when app says so.

Sploodge Posted at 2016-11-9 09:36
Nothing on the Mavic..

For IMU only calibrate is the App says so

How about the control sticks? looks like last Mavic update made some changes...

Following... I certainly hope this update addresses the issues people have been having.

stakhanov Posted at 2016-11-9 14:43
How about the control sticks? looks like last Mavic update made some changes...

The way I see it, the firmware addresses an issue. The app will still prompt you to calibrate the RC if required.

Once you have updated, with the Mavic off, power on the RC, go to the calibration in the app and check full movement of the sticks/wheel - If they are OK and the App does not prompt you, then  no need to calibrate ( unless DJI come back as say otherwise ).

That's my take on it