Would like to be able to entries in the Appearance Panel and perform Pathfinder functions to them. .
Example: Select 2 strokes in the appearance panel, one transformed some distance from the other, and apply the pathfinder Unite function (Fx) and have them become functionally one entry on one layer of the selected object.. This could eliminate some what are sometimes complicated procedures when outputting files to various RIP/machines/printers.

You can group fills first and then apply an additional stroke to this group using the Assistance panel
-
Randy Hare commented
Thank you so much! It never occurred to me to try to group things in the Appearance panel – heck, they're already there in a group! That works exactly like I want it to.
-
Randy, but why not like this?
Just group and apply style.