In WoW, AoE spells are able to bring stealthed enemies out of it. I don't see a problem in carrying over that same mechanic in Hearthstone...
You seriously want to make it impossible for an opponent to respond to stealthed targets? Well don't you just want your favorite class to be unbeatable. Opponents need a way to respond to different cards, otherwise it defeats the entire purpose of a CCG.
By the way, Rogue spells are far from useless. You need to use them efficiently if you want to make them work for you...
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