So when Rise of Iron comes out, they're introducing ornaments. Essentially, they're weapon/armor skins.
I have a suggestion for expanding the idea of of ornaments. We all want transmogrification, the ability to alter the appearance of your weapon/armor. And forever now, I've said the rare gear is some of the coolest gear available. Going forward, how cool would it be for regular tower Legendary gear to have ornaments? And the ornaments in question would be the rare gear.
Granted, I know nothing about coding a game. I don't know how hard it would be to take existing rare gear and use them as an ornament. But think of the possibilities for the "evolution" of ornaments.
Tl;dr: Let tower gear have ornaments. And the ornaments are just rare gear weapon/armor skins.