It sounds like you want the baseline for stability to be defined solely on how a disc flies in a headwind. That's certainly one way to look at it. I don't agree with it. But to each his own. Maybe if Old Settlers Park was still the course I played most often than I might (highly unlikely) side with your slant on the idea of stability. But I don't. I have yet to play a course here in NC that has the unlimited openness and treacherous winds that Old Settlers Park provides. As much as I detest the Firebird or any disc with the overstability that is equivalent to it, I will admit that I would certainly carry more than a few discs like it if I had to always deal with strong winds.
I believe defining a baseline in a near windless setting is a more realistic approach to defining stability for a broad range of discs. It creates a median or center point to which discs can be compared or measured accurately.
?????????????
Stability is simply resistance to high speed turn...wind condition simply exaggerate speed and produce turn
An overstable in the woods is a good thing for those has got to absolutely make a hard fade, OH and meathook FH shots....you don't need an overstable but it can be handy...to each his own theres many ways to play a woods course.
I don't get whats so hard to grasp about more vs less stable.....