The current set of Kendo DataViz components are pretty nice but it'd be great to have more control over the colors/shading of chart items. This is more important for interactive charts where a user might click on an item, and then a small snippet of code would re-fresh a sibling chart to show more detailed data, etc. Visually you'd want to highlight the currently selected item (similar to the piechart Explode option) with a different color/shade.