The interesting "missing metric" for me is comment heat. Rationale: I've occasionally made a polarising remark that appears to attract almost as many downvotes

The interesting "missing metric" for me is comment heat. Rationale: I've occasionally made a polarising remark that appears to attract almost as many downvotes as upvotes. These remarks end up with maybe +3 karma after 24h of jiggling vigorously up & down but this doesn't represent the total number of votes. With any aggregate measure, the distribution of values summarized may be as revealing as the value itself.