Alpha feedback from various sub-doom games:
Awesome stuff:
Dire Guardians
Hunter
Dual types
Subcommanders (most of them)
Core Turret Controllers
(Base Game) Threat improvements
Less than awesome:
Shark: it seems like this should be two plots, one that causes aip upon cmd death, and one that causes additional AI attacks for the same (the latter would keep the shark name, the former could be Escalation or similar).
Exotic AI: instant death on 10. It does not seem to use the right calculation for strength; its attacks are far stronger than even mad bomber waves.
The Warp Jammer subcommander : 13 counter posts is acceptable iff I've enabled the Retaliatory parent AI.
Combat carrier : doesn't seem to have a role. Fleet support is far better achieved with MSDs, while drone production belongs to the Enclave starships. I would scrap it and add the Shrikes as their own youngling ship.
Special forces alarm posts : These can produce unwinnable situations, especially in conjunction with Hunter. I would increase their AIP on death to 10, and make destroying the post never trigger the SF alarm.
And the big one: the Showdown.
As it stands, it's not ever worth it. You need an FS-grade chokepoint to win, and it attacks harder than the FS finale. There are a few other issues, too.
If it's included in the expansion then a bunch of things should happen:
Make it worth it: basically, this can be another, looser FS campaign, but it doesn't make sense as the current, completely boolean Showdown. I don't think it can work that way.
Rename them to AI Warp Controllers (keep the SD moniker in the entries, if you want), and introduce a secondary hacking mechanic (AI Warp Requisition Antagonism, which also adds to a "defense fund").
You can warp in ships and structures you can't normally access from these devices, if you can stand the response. Bigger stuff requires you to "hack" multiple AIWCs simultaneously.
Examples:
Fully build Z trader stuff.
Mk IV turret tech.
Core Starships (the unit so named, not starshipsV).
Guardians.
Hunter/Killers (mkI only).
AI Forcefields (the kind that don't reduce your firepower).
Fabricators (randomly generated).
A fleetship unlock (ala ARS, but with your choice of any).
The antagonism would scale with some >1 exponent, so you would have to choose wisely. But you could get enough stuff to make the showdown doable. The finale would require all four (and scale with whatever superweapons you have enabled, as well).
Clearer journal entries would be good, too.
And finally, the AI GCSs should use the same graphic as the AI home stations.