Well if you're talking about member account info, I don't think being an admin allows that access to that - since when you register at Delphi you register to the whole system not just one board. And since pretty much any average joe can go over there and set up a board, it'd be a huge security problem.
As for the privacy issue, making someone else the admin really wouldn't make it any different than how it's been for the last 2 years. Only a few months ago did they start limiting how far back in time non-paying members could look. And I hate to get into all the legal garbage of internet privacy, but since its infancy, anything that gets posted on any message board automatically becomes public domain (or public only to members who have registered if the board operates that way).
For all intents and purposes, it wouldn't change at all. I don't want to make it a fucntional message board again, just let it sit as an archive of sorts. Family isn't always great - there are fights and disagreements, but it's still family. For me, to lose that board would be like seeing the family photo album tossed into the fireplace.