Bungie, just for the sake of goodwill: bring back all year one armor ornaments (Factions, Vanguard, Crucible, etc.) as universal ornaments in year 4.
Many people have unlocked the New Monarchy, FWC, Dead Orbit, Crucible and Vanguard armor ornaments back in year 1. When year 2 dropped, those ornaments became useless because of the armor changes that came in year 2.
But all those year 1 armor ornaments are still inside the game gathering dust. They're wasted right now being only able to apply them to faction armor that was re-released in year 3.
So, just for the sake of goodwil: bring back all year one armor ornaments as universal ornaments in year 4. If you already unlocked them in year 1, they will be on your account as unlocked universal ornaments. If you didn't unlocked them in year 1, or you didn't play D2 in year 1, you will be able to unlock them through a quest, or something else.
Thanks for reading :)