I thought of a lot of things. Like being able to rate servers. That would be cool.
There is an old add-on for this. I'm sure someone would be able to fix it, but here's the problem: If you don't like someone, you can rate their server poorly, and even good servers would be shown as bad, and no one would go. People who are just starting to host servers would be visited even less that now just because they have no ratings.
And having compitions to see who is the best builder.
This can be arranged on the forum. Really, just go into General Discussion and post a topic about a building competition. If you're not a total idiot about it, people will probably come.
And also making a homepage for your character that will just say your name, show your picture, and say your status. Like status, a gold player, silver, bronze, ect... Some people see you as stupid based on your "number". But some of the newer players could actualy show that they are better than the older ones.
What statistics would this ranking be derived from? Those ridiculous achievements? A rank is just a plain bad idea. People already falsely discriminate against people with higher BL_ID's than them, this would only make that worse. "Gold" members would constantly put down "Bronze" members because they think they're better than them.