Hey Live Team,
Please, please, please use the Merchant Refresh in the Tower to rotate Elemental types on Armor for the Tower Merchants. It's incredibly frustrating to see a piece of armor you like, with the exception that it has the wrong elemental type.
I would love to see elemental types rotate, especially for limited time events like Iron Banner. It would keep people coming back to the merchants and it would give you more ability to customize (and in a manner that shouldn't lead to horrible cheese.