One of the things that is needed is to smooth out the AUTOPILOT inputs to the control surfaces. Any adjustments in verticle speed or altitude capture are very abrupt and not realistic to real life aircraft.
In fact many of the movements are so aggressive they would almost certainly create a zero G effect with violent nose down pitch changes or negative G’s with harsh pitch ups when using the autopilot.
Pressing the attitude hold/capture button in even a gentle climb in ANY aircraft will cause an aggressive nose down pitch action that is not relaistic to the real aircraft.
Another example is in the TBM, just press the VS button with no dialed in verticle speed in level flight and the aircraft will make a pitch bobble for a second or two.
A possible solution would be a dampened or lessen the trim input when it comes from the autopilot. This would probably also benefit the aerodynamic model from not having the wings change their angle of attack abruptly, possibly causing less instability in the flight model.
Thanks for the hard working in trying to make it great!