None of those look particularly easy to me The AI engineer thing is probably a lot trickier than it looks; getting them to use the FRD flag is one thing, getting them to act as if in FRD is another.
Never knew that the AI engineer management behavior and FRD (or FRD like behavior) didn't play well together. Yea, that would make it trickier.
Adjusting the turret firepower-estimation thing is easy, but I don't know of a value that would be an improvement.
How about something that is still probably underestimating, but to a lesser degree?
Like from 10 in the denominator to something like 5 in the denominator. (Or 6 or 7 or something) Yes, that will double it consideration (if 5 is used), but that is still a large underestimation, and thus shouldn't hurt game pacing too much.
As mentioned in the linked forum thread, some "fancier" methods for the AI to consider turrets may be needed, but that kind of thing would fall out of the realm of "quick fix".