We occasionally give one person in our consultant's companies Admin right so they can manage their own team members. That help avoid the email chain of them needing to add a new team members and waiting until we get around to it.
The problem is that anyone with Admin right can also edit models.
That causes problem with them inadvertently editing or owning elements in our model.
I'd like to propose a new Permissions level where someone can manage their team but not have Edit permissions