Currently, the donut chart is the only visual that contains a percentage of total label. If you have a lot of categories, a donut chart becomes less useful. I know you can use a measure to achieve the same for some of the other charts, but you can't create measures in a SSAS live connection. It would therefore be very useful if the percentage of total was added to (some of) the other visuals as a detail label option, especially in the bar chart ones. It seems like this would be a pretty straightforward edit, since it already exists in one of the standard visuals.
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