Level crunch to 50 overall should do the trick for the next 5 xPacs

They can do it that you start at lv 1 and finish arr at 10 and then level 5 levels per old xPac.
They should also trim the "fat" from the story, too many unimportant things in each xPac, players dont want to go trough 100 hours of story just to join their friends.

They wont tho, because selling story skip is great for business :shrug: