Revit :: Openings And Their Inability To Be Phased

I have an issue with openings not being able to be phased.  In renovation projects it is quite common to widen an existing wall opening, for example.  However, openings cannot be phased, they can only be existing and therefore the only workaround is to add the 'new' opening, with its eventual width, in the 'as existing' view set and close it to the 'existing' width with a wall, or walls, that can be then be demolished in the 'new construction' views!