I would like to suggest that the new Admin Center be included with the existing Admin Centers, rather than a separate kind of thing that we access in a different way. The reason that I ask is because we have a lot of new things to learn, which is very exciting, but if we can build on what we know - it is an easy learning curve. We already know that all the admin centers for the different services are located on the bottom left of the Admin Portal....so why look anywhere else for it?
Also, the natural expectation would be that there would be an Admin role that is specific to that service, for the confirguration of environments for example, so that the Global Admin can delegate that role to someone without impacting other admin roles.
Existing Admin Centers (left side bottom area of admin portal):
Power Apps Admin Center (top right near user icon in Power Apps Home Environment):
Assigning Admin Roles is missing the Power App Admin role:
PowerApps is not specific to Office 365, which is one of the primary reasons it is not integrated into the Office 365 admin center. Instead, has it's own admin functionality that applies to whatever subscription the user has.
Since no one else voted for this approach, I'm just statusing that I am ok accepting the current approach.