This gonna probably already be asked, but any chance to see some sort of Guild/Clan/Fleets Depot ?
This could be a buyable Buildings, taking a slot, and upgrade could provide more space allowed.
In gameplay terms, some depots/stocks could also lead to some sort of trading mission for players. I am sure a lot of people would be interrested to make a delivery contract, for moving ressources or materials from a port to an other. This could add some delivery mission as in Elite dangerous, but player drived.
Sorry for my bad english