I have a solution but they would never do it.
If you have a level 60 already then you get to fast forward and start with a fresh 50 on the alt and then just have to level it to 60 to do endgame.
I don't think they would ever go for this though. This is why I have never made an alt...way too much time to run with other people...and I don't have that kind of time to play.
Maybe some day they will do something for us.