Having travelled at a guest and been a host for a few years I think this idea has merit but needs to be carefully thought out and trialled. Maybe some categories rather than cleanliness there could be; Leaves your Airbnb like the home they found and not a hotel, Shows respect to the host, Communicates in a positive manner, Appreciated living locally, You would love them to a repeat guest at your Airbnb., with five star ratings for each.
Obviously these are just concepts but would be inline with the Airbnb philosophy rather than broad categories that are braodly interpretted. If guests were aware of these areas of evaluation them it may encourage them to modify their behaviour accordingly. I also would turn on Instant Book if they were deemed an Airbnb Superguest!