Hi Guys,
This has been the default functionality since Aria Automation release 8.1.1.
If you're logging in as a Service Broker Administrator, you won't see the Overview tab. You have to have the Service Broker User role to see the overview page. The Overview feature was triggered by the Cloud Consumption Interface (CCI) solution (not yet General Availability).
There is an internal feature request raised to have the ability for an Administrator to turn the feature off for users, but no ETA on release as yet - it has been requested by a few customers. I'll add your community post to the request list.
Regards,
Greg D, VMware