It can repair, resupply and respawn, so for combat you can fly it into a system in conflict and you are your friends can use it as a base to carry out your combat operations. It can jump 500ly, so potentially explorers can use it to get to systems not previously accessible. These are the two possibilities I see as useful at the moment. It may also act as UC, maybe a cargo, module and mat storage. Those are two obvious possibilities from what we know at the moment, there will probably be others since it comes in mining variants, we will have to wait for more information as the release gets closer.
I don't think that we know it will respawn. We don't know if it will have cargo space.
I hope it will have a commodity market with prices set by the owner, but we won't know for a month or two yet.
In those cases FCs seem pretty redundant and are QoL feature at best.
That's right. This is not going to change the game overnight. It
could be completely useless. If for instance it has no cargo storage and no market and the fuel costs are high. It will be useless for mining, when cargo is necessary in order to swap ships, and useless for exploration, when undiscovered stars are rare less than two jumps from the bubble. If it doesn't have a commodities market or it has one with prices set by the BGS, we won't be able to use it for trade in any meaningful way. If we can't specify that members of the general public can access its services, then we can't set up a resupply station far from the bubble or support a community expedition.
But imagine setting up shop in a system 500ly from the bubble as a void opal supplier. You do the mining and other commanders buy the opals at, say 800k Cr, and take them back to the bubble. Imagine a string of FCs offering resupply and refit services to the public.
It could be a new way to make money and to make the galaxy a richer experience.