Put simply, it's unacceptable.
For my child, why would I want to have to manage completely different sets of limits, curfew, blocked/allowed games, allowed ratings, etc for every device to which they log in?
This needs to go back to the old way where the child's account spanned all devices to which they've logged in.
Furthermore, when attempting to manage this new format, here's what I see in my Family Safety area:
How is this helpful at all? Nowhere on this screen do I know the device for which I'm altering the settings. If I click another instance of my child's name, I have no idea which device that is going to either.
I also have a sneaking suspicion this recent change is what is causing so many parents to have settings not taking effect, etc. They're probably altering the settings for the wrong device (because they have no clue where they're at in the system and I don't blame them) or the backend is simply doing things wrong.
Please fix this.