1) More "things to do with friends" that don't have any connection to levels or progression. Like Mahjong.

I would love an ability to sit at a table, and go into a very simple virtual table top. All you need are a functional deck of cards, dice and maybe some pawns or tiles. No need for any rules implementation- as long as the players could sit down and say "hey, wanna play Go Fish" and actually be able to. Or roll some dice.

If they want to go hard into it, making a virtual version of those 30-in-1 game sets that have the copyright-free games packed in.

2) Some way to have larger 1 piece furnishing you could deploy in the world. Even limit it to outside-sanctuary areas.

Like, I want to be able to pitch a tent. Or set up a picnic blanket.

3) A selection of venues that can be rented for private (or public) gatherings; or alternatively are just always open for use:
-A large ship; fishing possible (exists in public version)
-An airship
-A club; Host has control over crazy lighting/disco balls; includes stage
-An arena (with audience seating); host can spawn monsters
-A hotspring/spa/ski lodge (use slide mechanics)
-A waterpark. Lazy river inner-tubes....
-A functional acting theater; possibly various sets to choose from
-An honest to god Bar.