What: Allow me to click on specific entities, or data points, within the chart preview to create a new filter. That would reduce the number of clicks I need to do and I can much quicker create what I need.
Why: Today when I create a new custom report, I need to explicitely click on "Add filter" and fill in details to restrict what I am seeing. That can get cumbersome as I am leaving the chart preview and have to remember what I want to filter for and it's name (which might be very long - e.g. route name). The filter modal hides the chart preview.