Players would only use it for items that they couldn't sell on the AH at a profit over vendoring. And in that case, they'd more likely vendor it to have gold in their pocket.
Idea would not work.
If you truly believe that, Blizzard, show me you mean it. Because WoD didn't show me.As long as players are happy and enjoy the game, the team doesn't mind extreme peaks and valleys. They just want to ensure you have a great experience and feel like you got your money's worth.