As said above, sort out the bugs before going on to add in more things that could cause bugs. Though I'm sad the update's getting hate apparently. Personally, I think it's amazing and adds in a ton of stuff the community has wanted for years, and there's only going to be more to come.
What I'd like to see next though, besides bug fixes, would probably be updates to the map maker and maybe object maker. I'd love to see a way to create terrain above terrain- if that makes sense. Maybe something closer to Roblox's map making function, but also while maybe keeping the height map.
Also, let us turn the water, pleaseee. Maybe a better way of making rivers, streams, and waterfalls. Honestly the height map can be so drastic or flat and it's hard to get a middle ground- no pun intended- or maybe it's not a pun at all and is literal- either way, I'd love new or different ways to make maps.
Another idea of mine is a bit hard to phrase, but it's the concept of having textures on an object loop rather than stretch. This wouldn't apply to all objects of course, only really ones where the texture can be tiled seamlessly and naturally, like rocks. You could control the amount of looping too, for finer textures or less obvious looping.
Although I love the group ideas, and think it would get me back into at least taking some kind of part in roleplays, I stopped roleplaying a while ago, for multiple reasons, though I was never very into it, and I'm not opposed to doing it again. Heck, I probably will at some point, but roleplays are very different nowadays. That's not to say I don't support it though! I've been wanting group function updates too, probably more than what I said above.