As far as we know about fleet carriers it would not make an substential differenz if they are owned by a group or a single Person. The just did worked on it 2 year or they lie and will bring it for the payed expensIon. I think its Option 2 sad but sorry
They have not worked on it for two years. It was shelved for most of that time.
There are features that I would like to see in a carrier that need to be more than a personal space station. For example I would like a commodities market that allows me to set prices and splits. That way I can make money from it, split mining income with friends, and use it to store cargo. But that's a major change to the capabilities of the commodities market that could have further repercussions for the BGS. For example, a personal carrier must not sell more goods than it has or buy more than it can afford. If all markets worked like that it could prevent a lot of PP exploits. There are other questions. What happens if you set up your carrier as a public repair/refuel/restock station and then sixteen yobs land on it and refuse to leave? Can you set it public? It would be a great addition to the game, but Frontier may not have considered it.
Without some way to offload cargo, it's going to be almost useless in a mining or exploration role. After one session of mining you won't be able to swap ships.
There are things that you could do with a squadron carrier that you cannot do with a personal fleet carrier. For example all contribute fuel to it.
It is very possible that carriers as currently designed might be a bit naf.
It hasn't been worked on for 2 years and this latest delay does not add any time to that; it just moves the last two months of work into 2020. We don't know how much effort has been put into it, but certainly not 2 years. It's probably under 6 months even with this delay. And, personally, if the current plans are for standard space-stations with restricted services that only your friends can use, I hope they spend some time to explore the possibilities or I will not be interested.