SLA option for averaging

Currently, the SLA widget will report the amount of time that all device/datapoint pairs in a group meet the SLA.  It also is desirable to show the average for each device/datapoint within the group as the result.  The current method can be explained to folks after some time, but it is a case of "interesting but not helpful" (in most cases).  I would like to see an option to calculate the result either way, please...