The primary conundrum MMOs deal with at the moment is the wanting of the player base to keep the old content lengthy and to promote learning when the majority of the player base is past the learning content. It's been like this for a while in WoW and is the primary reason they added the instant level option, along with developing a special tutorial area that players had to play through once they did the jump. Eventually they will have to do something like it in FFXIV unless they want to completely invalidate the leveling content by nerfing it or speeding up the leveling process. Not sure how it would work in FFXIV, given we need cross class skills as well.