Filtering a Measure with another Measure

I have a simple scorecard that is showing the output of a measure (Feature Active Users).  This measure is taking a user table and filtering (depending on feature use frequency) for only active users. When I go to "Filters on this visual", I can't really add a measure to filter this value by. My goal was to filter by another measure (Unique Features Used) that calculates the distinct # of features used (feature use intensity), and filter feature active users by only a single feature being used. Why can't I do this?

I know I can kind of combine both measures logic into a new measure, but is that the only solution? My report has a lot of measures already, so I was hoping to avoid creating more. Any advice is appreciated.

Thanks!