I work on some big residential projects and we have constantly problems with elements being excluded accidentally. Many groups report excluded elements but they do not restore them. I used Dynamo (here: https://forum.dynamobim.com/t/model-group-excluded-members/45251) to find groups with excluded elements but some groups actually seem to not have any and still show a restore excluded button.
It would be very useful to have an option - a type parameter to block a group from excluding elements from it.