We also need a way to decouple everyone’s personal info from publicly available information about them, keeping in mind that not all publicly available information is intended to be that way.

Here's a crazy idea, what if the personal information becomes publicly available something like a century or two after their death? How cool would genealogy be if you could go through and know more about these vague people from 2 centuries ago than just "this is bob, he was born on this date, married on this date, had kids on these dates and died on this date. Oh and here's a single photo that could easily have been misidentified"