Originally Posted by
Captain Midnight
I wouldn't really call it cheating. It was in unintended way to beat the boss, yeah, and okay, it got fixed, but we've been able to hearth while in combat for years now. You can't Rez in Combat, you can't eat or drink in combat, so we know the mechanics are there to prevent us from doing things while in combat, but instead of changing it to prevent something like that from ever happening, they keep it there and changed the encounter.
It's just another use of the game's mechanics, imo. There was a time that Illidan cast Shear and the "only" tank that could tank him was a Warrior, due to shield block. However, I've heard several stories of Paladins tanking him, and a few stories of Druids tanking him successfully with the use of Intervene. You might say that's completely different, but I stand by my opinion:
If hearthing out of a fight is a bug, Blizzard would change the hearthstone to not work while in combat.