Bad design is bad design. If someone is going to create a bad dashboard, they are most likely going to create a bad CUI as well.
Just because most dashboards are poorly designed doesn’t mean we should scrap the concept altogether. Instead, we should be teaching people how to make good dashboards, including CUIs if it makes sense. Good dashboards make it clear where something interesting is happening and allow the user to quickly inspect for more details. The CUI you recommend seems to be a work around to overcome bad design.