This would fall under a small "quality of life" improvement but the legend for a stacked bar chart is always in the opposite order of what one would intuitively expect when going scanning from top to bottom (the top item in the legend is the bottom item in the stacked bar) . If that isn't changed it would be nice to have a "reverse" order button in the legend settings box, similar to what is available when changing the Value Ordering property for a column.