Let me suggest that you make the leader board 160 names long. The typical human brain can follow the complex social interactions of a group size of roughly 150-ish people. It varies some from person to person but you see social breakdown in groups larger than about 150-ish people. I think it would help recreate the sense of community that existed when I originally joined which seems to have deteriorated. It would be a core upon which to add social scaffolding.