As an report user, I would love to be able to change my color & bubble sizes without having to "Edit" a report. For instance, if I had a scatter plot with Sales Orders where the bubble size represented Order Size and the color of the bubble represented profit %, I may have different criteria depending on my filters. I would love to see where I could have colors assigned for Min, Center, and Max; but have the ability to change within the visual (like a parameter) what those colors represent.