Perlmonks works fine, not only for its members' diversity, but also for its voting system.
Our existing perlmonks xp system, while often criticised (e.g. How is it possible being a saint without posting?, Newbies and votes, ...), is superior to most of the other existing ones. Default ranking mechanisms of online community systems like YaBB only account for posting anything. Just hang around long enough, reply often, and soon you have the honor to be a "senior member" or something the like.

Perlmonks xp with its voting system could be made more complex, if the community needed it. As a possible new feature, there could be votes in certain categories. Like upvotes for creativity/novelty, upvotes for factual correctness, downvotes for the lack thereof, downvotes for ignorance/laziness, and still the good, old general votes based on the overall (first) impression one gets after reading. At least that seems to be the way most of us cast our votes. - But changing the voting system in a way like that would go too far IMHO.

Another important aspect for measuring the worth of a node is already achieved by the existing system: taking relevance into account. Someone (who needs to have a certain level) moves the node to the front page. Voila: more upvotes!

Update: This node keeps getting downvoted. Go on. Vote it down! Vote it down! LOL