This was helpful because I was previously using the Split feature within the Interactive Chart tool, but couldn't find a way to sequence the stacked bars in the desired order. Using the Crosstab tool prior allowed me to set the desired sequence. When I tried eliminating the Crosstab tool in your example and using the Split function, the bars didn't come out alphabetically, but rather based on first 'appearance' in the data (ordered by date). Would definitely like to see an enhancement that enables the following:
1) Assign sequence of Layers directly in the Interactive Chart tool
2) Ability to rename Layers within the Interactive Chart tool (for purposes of hover-over and Legend)
3) Ability to change the "Bar Mode" (i.e. stacked / group / overlay) between layers. (I'd like to use Group in one layer and Stacked in another)
I'd welcome any feedback on the above requests - thanks for putting this together.