My personal bet would be that they change it to "Replace your hand with a copy of your opponents until the end of your next turn". Keeps the flavor, retains a mostly similar effect, but without the salt of dumping your opponents hand.
Yeah and then combo decks loaded up with tradable minions can just effortlessly fish for their pieces for the rest of the game. There's a reason the effect is attached to a body that has to survive.
That is quite literally the dumbest idea I have ever heard.
Arcane missile becomes a 10-mana Deal 60 Damage, or even a 5-mana Deal 30 Damage.
It would just turn finishing the quest into the win condition.
Is there anything you can be happy about with this game?