No, we don’t want every item to have it’s own icon, as you can see from my post on that thread I linked we just want a way to tell the difference from a standard mission/public event reward chest and one with value such as a Rare/Epic/Legendary drop
You just need to make 3 icons and then update the current chests so the icon colour matches the colour of the rarity of the item inside
I even did a very poor mock-up of what we want via MSPaint, clearly you could do a lot better job but this is showing exactly what we are asking for, not icons for everything but 3 different icons that quickly and easily show the different rarity of the chest so we don’t accidently open a rare/epic/legendary chest instead of a common public event chest