Where is my level sync

[Preypacer]

I think Level sync should be added as soon as possible. We would all benefit from it, and would allow casual and hardcore players to party together effectively.

You assume "we would all benefit from it". You don't know that to be the case.

In XI, only the people who cared about leveling as fast as possible and little else benefitted from it. Others who still preferred the game as it was, had a much much more difficult time of partaking in activities that didn't involve sync'ing down up to 40+ levels and standing in the same spot for days on end.

You don't know how SE would implement such a system in XIV. You don't know how players would - most certainly - find a way to turn it into some new "OMG this is the new way to play XIV, 'cause the leveling is faster" one trick pony.