Mass change such as that is extremely cumbersome if using anything older than Revit 2013, which has View Template dependency.
In the past, we have had to do this with work that was "removed from the scope" at the very end of the Project, with the possibility of being brought back. What we did was create a new Workset (not visible by default) and place all of those elements on that Workset.
Corey D. ────────────────────────────────────────────────────────────────────── ⁞|⁞ Please use .Accept as Solution and Give Kudos as appropriate to further enhance these forums. Thank you!