I know you have the History Tree option but I would love to see a Snapshot button which would be clicked on to store your publication at that point. Each time the button is clicked then a new Snapshot icon would appear in the title bar somewhere and you could simply jump between these or delete them as and when you wish. This would allow pages to be experimented on and simply put back to a set point as required. If this is not possible, how about a Snapshot Button that inserts a Snapshot Icon in the History Tree which did the same thing?
I really don't like the short cut options that pop