Reading this topic and seeing the huge benefit for MAC based group association with IPv6 I thought about the possibility to add/substitute the client IP in the dashboard/query log/stats with MACs if configured in GM/clients (sum up all queries by device rather than IP). I guess most users would like to see the stats for their device rather than stats split by all IPs that device might have.
I'm not sure how to handle all the possibilities if a device has multiple IPs and/or multiple hostnames and which option should take priority in the dashboard.