My FC is my base. It's persistent in game and other players "know where I am" by finding it, it houses my fleet and my stockpile of spare modules, it mounts only the services I need to use it as I intend and is not a trading post for other cmdrs, the most they get out of it is a safe place to dock, refuel, repair and rearm - a service I am happy to provide to my brethren in the pilots federation even if we might have opposing contracts at present, the carrier is neutral territory. Also the very occasional taxi trip if they happen to be wanting to go where I'm heading. Hitchhikers are always welcome. It's funded for 5 years and before Odyssey drops* I'll be able to fund it for another 5 without any problem so lets not bother with the horsecrap about "credit sinks" ok?
Rather than putting any effort into "bases" that would effectively be static versions of FCs I'd prefer to see FD turn the creative geniuses loose on customisations for FCs. Mostly cosmetic, they wouldn't have any different characteristics but changing their appearance, modular bolt-ons that let your carrier look truly unique, paint schemes that are customisable by user settings (can we have those for other ships too please? you know you CAN do it if the beancounters only let you...) Interior environments for Odyssey, multiple options of these so we can alter our carriers interior appearance from industrial punk to decadent luxury to clean scifi utilitarian... There's HUGE opportunities here that while they do not introduce any extra gameplay per se, they will add so much to the "sense of ones own presence" in the game
* Odyssey - now there's the ONE place I think "bases" would be worthwhile developing. Something in Odyssey that is the planetary equivalent of a FC in space. Instead of "buy a FC", "Establish a settlement" that could be reached by the Odyssey-specific travel methods and could have landing pads for ships too. Similar in credit cost - and upkeep - to buying a FC but with minor tweaks to fit it specifically into the Odyssey environment. Social zone as standard the way marketplace is on FCs. Suit and gear storage available to the owner always but purchases available to others by buying in the service and stock the same way as shipyard and outfitting are on carriers. Same rules and prices for ship-oriented services as for a FC (If you've paid for landing pad construction, otherwise no ship services at all because they can't land there directly, the pilot has to make a rough-field landing and walk in or drive in using his SRV)