“[Bans] These will be added to the drop-down menu below (the list is also mirrored here). If your Arena deck contains a banned card, you will need to retire it manually (your ticket should be refunded).”
Hearthstone tean have you ever considered the possibility of letting people finish their events (Draft/Arena) before you actually BAN THEIR ENTIRE DECKS in cold blood, just because you decide to ban cards that are part of those decks? I’m just saying…