What is the problem or goal the end user is trying to solve or accomplish?
Currently, the Sankey chart only highlights the value when you hover your mouse. It would be great to have the highlight done for all the steps as well.
What is the recommended solution by the Customer?
Create an option to highlight whole steps in the Sankey chart.
I suggested this. This has significant implications for the data structure, which wouldn't support this feature today.
In the end, your data would have to be Step 1 / Step 2 / Step 3 / Value 1 to 2 / Value 2 to 3 on every row