I too am no fan of the bouncing holographic exclamation point, thought it was just a temporary placeholder, but no. Sure I get used to it, but it still sticks out way too much, like it does not belong.
My suggestion would be to make an existing object, or maybe something new, activate the quest, same as the exclamation does now. One great one would be the mailboxes out in front of most POIs, then just add one to POIs without them... I mean everyone, every building, does get mail, so it makes plenty of sense. Then if nothing else just make it stand out to the quest holder a bit more when active to help identify it, like a gentle throbbing glow or something, just enough, no holograms, this ain't the Matrix.
I think using the mailboxes is worth serious consideration the more I think about it, plus they're already there for the most part.
PS: please no food spoilage, just my opinion, but it is still the biggest reason I hated Ark, and Atlas, and other survival games that just annoyed me far more than challenged me. We have plenty to deal with, though I wouldn't mind the meat count going back to normal numbers again, like 1 meat is 1 meat, not 5 meat is 1 meat, who the F did that and why. Stop it, I can think of no good reason whatsoever for that serving any purpose other than confusion. Deer would be 4 or 5 meat, not 20 or 25 to make 4 or 5. Rabbits like 1 or 2, fine. Some fancy meals could require 2 meat, but most all others should be 1 to 1 ratio, I will never understand why that devolved.