It would be great if when displaying the top "X" number of values for a dimension it was possible to opt to display an additional row containing an aggregated sum of all the other rows not displayed.
This would be useful for showing the complete picture. The below is an simple example of how the "donut" percentages do not reflect the complete picture because it is only reflect the top 5 values and does not account for the other rows. (e.g. Internet explorer 65% of traffic according to the table but shows as 70% in the donut)
Just to be clear it's not just donut related... equally one may want to trend 'other' as volumes on a line graph, display it in a bar graph etc.