I highly suspect that Carriers, alongside most systems have been in ED, will be "v1.0" on arrival and offer a subset of a final feature set. We still don't have rumours in the FSS, so I'm skeptical of anything but a place to dock, refuel and... well, that's about it.
Maybe being able to call a few ships in so you can have that thing we've all wanted for ages "Load outs" (if anyone is, or was, a WoW player you'll know what a boon they were)... but I doubt even that. They'll be big, expensive, horrible to fuel and a pain in the backside to manage.
I can't wait.