OK, I think that the customizable-AI feature is fully working. After some testing, I've decided to offer players 3 types of AI:
Carrier AI: Good for ships like the Venture; it causes these ships to behave as if they have the CARRIER setting, regardless of whether they have a flight deck (which also, incidentally, makes them do more broadsides).
Sniper AI: Good for missile boats and Tachyon Lance snipers, where we don't want them to close with the enemy at all.
Brawler AI: Good for any ships bristling with short-range weapons, where they make up in damage what they'll take in incoming.
Also am thinking about implementing a "shield removal" mod, for those ships who are better off without shields, foregoing protection for more Flux for weapons.
Then all I need to get done (for this build) is a couple of minor changes to put diplomatic relations in (in a very basic way, basically, adjusting relationships with everybody in the Sector when you fight another fleet) and put in some sort of "fleeing" state for the AI / player (right now due to changes elsewhere, there is no Escape mode, but it's moderately fun so it's going back in) and I think this build will finally be ready.