I believe it could be useful for group owners and their officers to have access to a sort of audit log that can show some of the following, with info such as XXX changed YYY from A to B at TIME. I am aware there is already at least some of this in the land/assets tab.
Changes made to group settings
People joining/leaving the group
-Maybe having something like "Invited by XXX" in the case the person was invited to the group
Adding/removing group land capacity
Buying/Selling Group land