This almost prompted me to say, "it's time to get people registered and active again." But my mind said ... "Oh wait .. first I have to fix ..."
Isn't that how you feel as a webmaster? You have just "one more thing" ... ?
There are so many items to fix on the sites that I really don't want bad press - people visiting and getting a 'bad taste' in their mouths.
My list is getting smaller and I'm feeling more confident in getting this beast moving forward. Is your list growing or shrinking?
I do have to say that without XenForo and this community, I'd have probably just not moved forward with merging 195 domains.