The new feature allows for more complex team designs, including the ability to designate certain accounts as admin accounts which can manage other subaccounts and form an arbitrary team structure. The administrators can now view all subaccounts and their descendants in a tree-like hierarchy, making it easier to navigate and manage their teams. This change also provides rollup mode, which shows total usage for each account and its descendants, allowing for better comparison of usage across different subsections of the team. Setting up this hierarchy is straightforward, with admins being able to designate themselves as administrators and view all subaccounts. The new features aim to make managing testing teams more streamlined and efficient.