In the past, people complained about having to do the achievements over for different characters. So I understand why Blizzard developers may wanted to appease them; however, like children, when you give them everything they want without working for it, you get a spoiled lazy person who gets extremely bored with the game and leaves anyway.
Children need to learn to work for what they want, so they appreciate what they get and become productive citizens...in game and out.
This goes for us grown up big kids, too. :)
Please...I want to do it myself. :)