@ayalalead
Technically, to ensure accurate modifications when changing wall types, it is essential to be in the plan view to visually confirm which walls are being updated /selected and that their types are appropriately altered. And to do that, it cannot be more simple than changingt the Location Line in the Properties palette. There is no logical advantage to switching to a schedule view for changing the location line when the plan view provides a clear visual context that helps in accurately identifying and modifying the walls.
However, if there is a need to retain the original state of the Location Line parameter as a backup, it is understandable since it may for one reason or the other allow for the restoration of the original Location Line after editing the wall types. This is doable by writting the value of the Location Line to a text field in the schedule. If you wish to receive more help on this, you can start a new discussion, my guess the OP has given up on this one if not on Revit entirely