Even if you create a new role Sub container to make an order in your thousands of roles, the created structure is not shown in the identity application, making in difficult to filter the roles/resources relevant for you. f.e. you create a Sub Containers pro application and you would like to see only the IT roles under Application A. In the current form it is really difficult to look for the proper role, if you don`t know the Name of the role. Sub Category would help in that Problem.