This kind of works but users don't always express their intent in their edit actions, either because no available edit action can fully capture the intent or be

This kind of works but users don't always express their intent in their edit actions, either because no available edit action can fully capture the intent or because it was simpler to achieve the desired state in a different way. Changing 999999999 to 1000000001, do you increment by two or re-type the whole number? It is difficult to make users think in (invisible) state changes.