IIRC there actually was a ring in the original fairy tale, which allowed the Beauty to leave and come back to the Beast's castle whenever she wanted, but the Beast only gave it to her later in the story. And since this is based on the '91 cartoon I doubt it's the same ring anyway. It's most likely just a little aesthetic choice.
Speaking of changes to the story, are we finally gonna see that awful witch from the beginning get what's coming to her? The prince might have been an a** but what she did to him was still way too harsh.
And what exactly were the servants guilty of?
Seriously, screw that hag. She's been avoiding her rightful punishment for way too long now. Justice needs to be served.