Currently if several people are editing the same page they may overwrite each others changes.
It would be good if this was handled somehow. Maybe with a warning that the save would overwrite newer contents. Or by locking a page while editing. Or if the save would only save the parts that's actually changed that would minimize the risk of overwriting each others changes as long as different things have been edited.
Use cases:
Two people editing the same page at same time
A user is taking long time to finalizing his edits. And another user starts editing the same page and saves before first users is done.