Flyable and non-flyable FM differences etc.

[The Stalker]

So basically the flight characteristics of AI only FMs are a bit more "raw" in terms of maneuverability, speed, stall, lift etc? As in more approximate than flyable ones?

[JtD]

More like they might be missing the proper frequencies for their oscillations, be a bit raw when it comes to damping, have unadjusted ground handling and things like this. It usually just is the real fine tuning that's missing, exceptions go both ways.