#TeamApple, iOS 12.1 is available today and will allow you to do GROUP FACETIME, with up to 32 people. Why do you need that? Possibly for business conferences, but any regular person.. I don't even have 32 friends that I actually want to see via a video chat.
Anyways, the update is available today so make sure you don't hit "Remind Me Later" like I've been for the past month or so :)