I feel like the steam workshop condos are still heavily underrated. There are some incredible builds hidden in there that most people miss and that rarely get hosted publicly. I could easily name 10 or more with hundreds of likes that would be such fun hangout spots if people had easier access to them and if they were permanently online.
Granted I have no idea how the implemention would look like on the technical side and if players who uploaded something years ago and stopped playing can consent to their work being shown more publicly now. But I feel it would be a great way to show off cool builds, even if it just means enabling dedicated condos for builds you haven’t made yourself.