Change Ownership
The ability to switch ownership for builds between people was pretty bothersome, as one had to save the build, give it to the new owner which could then load it. New Duplicator may have solved this issue a bit as you now could duplicate someone elses build and plant it yourself. Removing old build in the meantime was also alright.
However, the issue came up that you have to first duplicate and then plant it again, putting stress on the server as well as the user. The solution was this item which may easily change the ownership of the build to a new owner. An admin can even take it and give it to anyone if they feel like it.