According to my knowledge there is no option for creating management zones automatically. But what I suggest is using host_group_names and creating management zones by them. Using tags is also ok but according to my experience it is good to make rules as simple as possible because in large environments they are hard to manage 🙂
@Wolfgang, is it also possible to have a clone option in the UI for Tags and Management Zones as well? So it will be easy for the users to clone and just change whatever is needed in a large environment.