Currently, when you select to show filters at the bottom of a report, the only way to tell whether those are excluded or included values, is by the color of the highlight line underneath the filter name:
This color is excluded, while the one below is included:
Not only is it terribly difficult to see, this is especially hard on color blind folks. The only indication of whether that means included or excluded is the color. If you're colorblind and trying to figure out what reports are affected by a bug with excluding values, for example, you won't be able to tell which reports you need to update without opening them all.