I think one of the biggest problems we have is finding a good solution that'll feel valuable to people with massive Iron Coin caches without it feeling pay to win/too exclusive for other players. We do have an event coming later this month involving Iron Coins, so we'll see what everyone thinks about that when it arrives. We just didn't want to throw something grindy into the Anniversary event (especially since we want people to go after the Precious Soul Fragments in the campaign).