NPCs have never been able to use FAOFF
No they just plain cheat...same diff.
You're perfectly entitled to that opinion. Until you back it up with facts as evidence I'll still take the word of the person who wrote their code over an unsubstantiated opinion, sorry. If you do have evidence that demonstrates NPCs are doing things with the flight model that a skilled pilot cannot, file a bug report.
Where the flight model is concerned I have seen lots of folks who had a hard time outflying an NPC getting all salty over it and claiming they cheat, but not a shred of hard evidence. When it comes to scanning, detecting cold drifting ships "visually" when they really shouldn't be able to "see" you and their turrets/gimbals seeming to be less vulnerable to our chaff than ours are to theirs, I'll concede that there may be issues there but referring solely to their flight model, in my time playing (since PB) and watching videos of pilots much more skilled than I taking them on, I have not seen a single piece of hard evidence that they use a flight model any different from ours. Period. In a similarly equipped ship I could always match their pitch, roll and yaw rates, acceleration and max velocities both from main engines and lateral thrusters.
Even without the programmer describing how they were coded (and she has no reason to lie about it) I would still not believe a cmdr claiming that an NPC has access to a tweaked flight model that we cannot configure a similar ship to match without a lot more than "I got outflown by an NPC! This can't be happening! They must be cheating!"