I think the Transmogrifier is brilliant. People will get to have a lot more choice over how their characters look and it'll allow people to look more unique in-game. I think you'll only be able to use it on armour you already have, so if you don't have T6 sitting in your bank you'll have to go to Black Temple and pick it up, etc. Still it's better than having everyone running around looking like clones of each other, and why shouldn't we get to use old gear for looks? It's not going to have a negative impact on the game. It's not going to make raids easier. It's not going to change anything about the game except how your pixels look on screen.