I'm pro cranking out droids if we know what we're cranking out, but simply stockpiling them and building up a reserve of them just in case. It's a production facility, it needs time to leverage it's power for all that it is incredibly powerful- and if we rely on production solely during crises we may not have enough.
As for burying it if/when we don't need it. See my thoughts above on that. Ciaran isn't going to live forever, but that doesn't mean we can't ensure the Abyss Walkers have the capacity to act if need be afterwards. I mean, if we really want to- we could do something like
G0-T0 except intentionally, with better tech, a Mechu-daru specialist working on it, and with a better moral compass.