Panning to follow standing humans is quite good.  Being tall & narrow animals, humans have a very stable X as body parts come in & out of view.  The Y is erratic.  The erratic direction reverses when they lie down.  The next question is what body part is most often in view & can we rank body parts to track based on amount of visibility?

It depends on how high the camera is.  A truly automated camera needs to be on a jib with a computer controlling height.  Anything else entails manual selection of the body part to track.  With a waist height camera, the butt is the best body part to track.  With an eye level camera, the head is the best body part to track.

Lacking Z information or enough computing power to simultaneously track the viewfinder, the only option is adding a fixed offset to the head position.  For the offset to be fixed, the camera has to always be at eye level, so there's no point in having tilt support.  There's no plan to ever use head tracking.

The servocity mount doesn't automatically center, either.  There needs to be a manual interface for the user to center it.

Autofocus has been bad.

It's all a bit less automatic than hoped.  For the intended application, butt tracking would probably work best.