People need to learn that you can't do X with some cards and Y with others due to personal balance. Its not a nerf thing either.
Any time this happens to a card, the dust standard occurs. Unleash the hounds got its dust value edited when it was REDUCED in mana cost from 4 to 2, but thats a NERF and warrented the dust disenchant right?
People actually need to stop trying to seem like they know things and actually read up, Bow will get its dust appopriately adjusted, but be patient.
Furthermore, being rash and disenchanting your cards before looking at the dust value helps no one. You have nothing to blame for that one but yourself. Whenever a card has its dust value edited, it is even displayed at the title screen. Blizzard has several alerts so you know what you are getting into (the dust ammount is directly on the button to disenchant), so there is no one to blame but oneself.