It was obviously bad from the get go. People just didn't like Demon Hunter and decided to take their anger out on that card.
It's more people thought DH was broken, so every DH card that looks potentially good must be the comming of the end. We saw it with Kreen, star student, and glide. All cards that see little to no play, but were all insisted to be broken. The first legend I pulled was Kreen, and while I thought he was going to be mediocre this expansion, I thought that it was probably better to have than not. I play singleton hunter, and I don't even fit him in that deck.