Being able to see what members of an email group viewed which emails would be a useful group setting. In multiple of my email groups, we rely on constant emails that confirm one or multiple members have seen/dealt with the email and its subject.

As an example, I am in an IT group in my work with multiple other technicians. When someone emails the group with a problem, we rely on multiple emails about who will handle it and when it gets finished. It would be a much simple process for the first person to see it to just flag the email as "In process" and then as "Completed" and have the other members see this so they don't have to ask about it being done.

I know the flags already exist to do this, but it would just be a matter of that flag showing up on other group members inbox as well.