honestly, why a new player will try to play to a game almost at high level without even know anything?
let's them soak how work the game before drop them into this level range....

i'm not fond of the leveling potion, since people arrive at high level without know anything about the story, in a mmorpg where one of the best part is the world and story is kinda sad, especially since the shadowbringer plot depend of event that did happend in ARR (crystal tower) and heavensward (warrior of darkness arc)
plus if they only take the game for play one of this two jobs without even knowing if the combat system will please them.... is silly