Could be fun although I would try to get several people involved to get a coherent average of someone's rating.
People like Dokletian, Remao, Aless, Bedoyere, Thorvic, Octanidas, Goodest not only master their crafts like few others, the have also proven being mostly impartial in how they rate their pairs and shown a good critical sense in their approach to community-based dilemas. In short, they are not cretins and know a lot about cav so I believe their opinion is worth being consulted, would they agree on giving it. There are probably a few other I didn't think about but I don't know cav as much as most of you guys do so I will let them be mentioned by people who know better.