It would be really helpful if Esri could simplify the symbology editing workflow, at least for simple changes like changing a polygon outline color. Where users can right-click a symbol in the Table of Contents to change a point, line, or polygon fill color, it should be just as simple to change an outline (perhaps via a 2nd color picker below the existing one, just for outlines). It would be still better if users could change a point, line, or outline size/weight in the same popup.
That's one thing that ArcMap did well that ArcGIS Pro still doesn't quite meet: the number of clicks it takes to change a polygon outline. While the ribbon/pane UI is more intuitive for most users to learn, the symbology pane in particular pulls users away from the cartographic design cognitive space too often for too much time and too many clicks. Over time, throughout projects or across multiple projects, that click-count and cognitive interrupt significantly accumulates.
