Currently, when searching a user in Core > People Finder, you can see their Host ID to the right of their name.
However, when you search one of their family members from Core > People Finder > go down to Relationships and click on the original user's name, the Host ID isn't there.
It would be helpful to see the Host ID when going from relationships rather than having to type in the person's name to see it.
This is was complete with the August 2018 monthly release!
Agreed. Even more, you should see all of the same tabs you see when you look them up from People Finder.