I have read all of the NTSB reports for fatalities, and having watched Trent most recent video, it seems the PRELIMINARY (I am not trying to speculate, hence the separate post) cause was the same thing that caused most of the fatalities.

That makes me ask, what is it about this design that lends itself to the stall spin scenario? Is it the flaperons and the adverse yaw (that I thought was mostly mitigated with differential aileron control) or something else? Is it maybe something as simple as the way these get flown by some, being bush planes and all?