If you need to edit a lot of parameter values for some elements, it will be faster if you export those values to Excel, change there and import data back to the Revit.
The script will work for all categories and for editable parameters. If some parameter can not be changed inside the Revit it will not be possible to change it by the script.
Workflow is like this, at first run the Dynamo player, go to the edit inputs for the export script. Select category and parameter and run the script. Then you need to go to the Excel file, change the values for the parameter, save the Excel file and then edit input for the Import script and run.
Please make sure that before you start using this script that you back up your existing project model.
Also, if you want to download this (and all other scripts) with my sample files please visit the Shop page.
The script uses the following Dynamo packages: BumbleBee v.2021.25.3 Clockwork v.2.3.0