In order to increase user confidence a "global undo" feature would be desirable. The idea of that is that "any" action can be reverted.

Of course this has to be within limits:

• emails sent are gone (although they may be held back for a timeout to "undo" accidental send)
• already synchronized information can at best be overwritten with a changeset that reverts the change (similar to a git revert)

If all modifications are going through the actions framework, then this could be a place where such undo functionality could be implemented.