You post so many ideas that I'm getting the reflex to skip your posts, just so you know you might want to be more concise.
What you are describing here will be implemented next release : https://gitea.wildfiregames.com/0ad/0ad/pulls/8525
A couple of different possibilities inspired by that, which might need refinement to condense on one useful thing:
-Target types: if one queues this with a sheep and a gazelle, the hunter would hunt all sheep and gazelles he has around. This could be also used for chopping all trees, garrisoning certain buildings, and boarding certain ships, as long as they are nearby. In case of troops, maybe it could work as cavalry targeting archers, while pikemen cavalry, and so on.
-Action stances: similar as before, but the target doesn't really need to be specified. One could hunt all non-aggressive animals (or also aggressive ones if that was selected) as mentioned, but could also work with things like "repair all", "board all", etc, as long as they are nearby.