It would be helpful to be able to list the users belonging to a group, both directly, and indirectly by virtual of being a member of a sub-group.
So for example 'p4 users -g dev' lists all the users belonging to the group 'dev', and 'p4 users -G dev' lists all users belonging to the group 'dev' or any of its sub-groups (searching all the way down the group hierarchy).
I can meet the first requirement (direct members) with 'p4 group -o dev' and pulling the users from the output. But the second requirement (indirect members) is a bit more tricky. I currently have a script to do this, recursively navigating down the group hierarchy, but it would be nice if it was supported out-the-box.