Regarding Fabs (not FacIVs), I get the sense that most of y'all don't consider them particularly valuable in and of themselves. At most they're captured as a side effect, a cap is built, and then brought out at the end of the game.
Going off Vyndicu's idea, instead of capturing a fab, why not have a uber-expensive, low-cap "Experimental Dock" that can be built anywhere, and make the Fabs instead unlock the corresponding ship? Just get rid of constructing the ships at that point altogether, since they're not doing their "job" of increasing the strategic value of the planet.
If this needs to be counter-balanced somehow (beyond the high cost of the Experimental Dock), here's some ideas:
- Increase the costs of the ships.
- edit: Have a fairly high Knowledge cost to unlock the Experimental Dock (say 6k?).
- Keep the Fabs as constructors, but permit a "Fab Hacker" ship to unlock the corresponding ship (perhaps before the world is captured). This could have the same effect as other forms of hacking, or it could increase threat, or something similar.
- The corresponding ship is unlocked for the AI as well.
Still thinking about FacIVs, but figured I'd toss this into the ring.