Right now, you have to switch your game over to a Personal Server in order to associate it with a group, or add users to the banned/admin/visitor list. Both of these features are useful outside of the context of a Personal Server, so I think this requirement should be removed.
Personal Server should be renamed to “Build Server” and it should be turned into a checkbox on the Access tab. If it’s set to true, the place is locked down so it can only have one instance at a time, and that instance automatically saves in online mode.
I pretty much suggested the player access feature here, but just access rather than banning and admin powers too. I have seen traces of this being in development although I’m not sure if it has been paused or not.
Also, I think there is a way of associating places that aren’t personal servers with groups, however I’m not sure it is an intended feature and I’m not sure wether it is easy to do or not.
Having that feature would be great for Studio groups and game fan club groups, allowing developers to directly link their games to their fan groups/studios.