you train people to use their currency within a week of event end, then you decide to add stuff to the store when they've spent it accordingly... at least you're consistent on not noting that reprint vendor disappears with the event so new people can get irritated every year.
why not just make another new AT instead of butchering an old one, or are we expected to go FF to keep the builds we liked every time you have the whim to "fix" something.