I woke up to balanced cards GONE from my decks, and I NEED TO PURCHASE THEM AGAIN?!? I'm a big fan of rebalancing cards, I really am. I want to keep the game fair and playable for and against all deck types. But, the fact that when you rebalance a card, you remove them from a collection is one of the greediest things I can think of. If you rebalance a card, and a user has copies of the prebalanced card, you should simply add the rebalanced cards to their collection AUTOMATICALLY. Otherwise, what is preventing your company from looking at which cards are the most owned (particularly from past sets), declaring them "rebalanced" forcing all users to have to purchase the cards? At the very least, you should provide a wild card for EACH COPY owned.