It feels a bit empty - so there could be:
1. NPCs bought from the store - like a servant or a singer
2. some way how to create your own group of 5 companions, but since they still do exist somehow, I think they would have to be disbanded first, and it would be probably theme for a new main quest, so I don't know how it would work otherwise
3. NPC small branch of your chosen guild - like a group of thieves, sharping their weapons, talking to each other
4. Named NPCs from quests, that could be your guests for some time, you could get notification of their arrival
5. possibility to invite a group member to your cave - the travel would have to be directly to the cave, because I don't know how many players would use that
I know, there are probably some plans about houses, but I would be OK with my cave
PAWS (Positively Against Wrip-off Stuff) - Say No to Crown Crates!