add ability to restrict relationship types pairs
You are already able to restrict relationships to certain types (e.g. organizations, individuals), but it would be helpful to also restrict specific relationship pairs so that one half can only go with the correct other half.
Yes, it would be an extension to the corporate relationship setting (e.g., employer/employee). In the relationship add/edit forms when one type is selected reciprocal is automatically populated based on the configuration (selected parent, reciprocal automatically selects child).