Today while using Illustrator CS6 I encountered an issue where I had multiple groups, each containing a set of text and non-text artwork, and when I tried to copy the Appearance from one group to another using the Eyedropper Tool I found that it seems not to be possible.
The fill and stroke colors get sampled, but not the Appearance. It works for non-grouped objects, but not grouped ones. The result is the same in CC 2017.
What workarounds, if any, exist for dealing with this?
Here is a screen shot showing the Appearance of such a group. There is a fill that is offset (note the "fx") to look somewhat like a drop shadow.
My Eyedropper Tool settings are set to use all properties:
More strange findings
With a single (non-grouped) object selected, I tried sampling some grouped items that had their Appearances added before being grouped, and this time the Appearance was copied without the fill, (still despite having all Eyedropper options enabled, as shown in the above screen shot).
Depending on the combinations of grouped and non-grouped objects, and whether the Appearances were added before or after grouping, different results occur. But never do all three (stroke, fill, and secondary fill) get transferred. There is always something missing.