Add the eyedropper function to the color scheme editor, map background color, etc -- everywhere there is a color picker. Right now it's implemented inconsistently.
The eyedropper tool in symbology is really helpful, but it can be little tedious to work with when the two layers are not on the same location or if there are too many features with different colors on the map. So, it could further help, if we could also use the eyedropper by clicking on the symbol color (under the contents pane) we wanna copy. That I think would make it really straight forward in this use case.