In the tasks view of the project, allow the System Administrator or Project owner to customized the task background color to turn the background of a task to grey if the tasks is marked "not required" - for example.
We find ourselves updating tasks - when it is not needed - because the task is marked "not required".
It would be more user friendly to quickly be able to see which tasks are not "active" and do not need to be updated when the project date is has changed.
Thanks.