This is fine, but the issue I mentioned here really needs to be addressed. Removal of the current API with no realistic replacement is going to be almost lethal to so many of my projects. Such as RoLive which is used by hundreds of communities across the globe.
I cannot stress enough how important access to PlaceId → UniverseId translation is for the usability of our applications.
It is not practical for us to maintain an authentication cookie just to get a universeId. Then It needs to be used from the same IP address too?