User blog comment:Dopp/New Profile Design Now Live Across All Wikis/@comment-954127-20110819001024/@comment-3366778-20110819002028

I don't see why it needs to be "better". The previous section on the user page for that, "Top Wikis", was what it was called, iirc, showed five and you could hide it the same way you can here. Also, Archduk is right in that you can only add wikis that you have edited at. The Chat Mod > Admin thing is indeed a known issue as well.