I can understand where your coming from but they only added level sync because FFXI game design was flawed. Its design didn't take into account peoples lives so years later(once WoW released) the amount of subs dropped and a lot of people just bought WoW instead. I doubt they will implement a level sync since they want people to grow and explore not abuse a feature and level in one area.
A lot of features they added in XI later in years was to cover up the holes SE didn't prepare for. If WoW never came out you could probably say FFXI would have hit the millions but Blizzard changed the MMO genre. Leaving FFXI to try and plug up holes to a sinking ship.
I loved playing FFXI for all my 7 years but sometimes you just gotta see things for what it is.