No, hairloom was invented as a reward for altoholics, who - no matter what you do - will never care again for leveling cause after 15 years of wow they have 10+ toons at 120...
Wrong again!
Leveling content is just a means to an end these days an NOT the game anymore. The game these days starts at (maxlevel - 10)
Wrong for the third! the world is not threatening anymore.
there are no "hard" areas in the world anymore
So you wanna kill retail? cause that is what would happen - people who played this game for 15 years would left the game and it be dead.
(Also REMOVING content is never the solution as enough RPG elements have already been removed)
So first you want the old world to be relevant and now you wanna level through it even FASTER?....
thank god you dont work for Blizzard