SE is absolutely floored with implementing features and keeping their current playerbase amused. They've already skimped on charging the full amount for a subscription fee and implementing level-sync is not only absent from the "Road to 2.0" but by extension would be detracting from development resources. We've heard the "They have different teams" argument before. In this particular case, the player base and the develop team has a set and defined path to the future and it's written in the "Road to 2.0" pdf. Anything that isn't included in that roadmap would, by objective evidence, be detracting resources (i.e. time) from whatever team is in charge of such things, not to mention level sync effects multiple teams; off the top of my head: UI, Battle, and Tutorial teams.
It has already been determined that level sync will be implemented in V 2.0. Despite SE charging for subscriptions they really need to stick to their promises before they can regain our trust. This concept can be quoted from Naoki Yoshida himself in some media interviews he made when it was confirmed he was going to be the new producer.
SE needs to stay the course, because if they don't regain trust, V 2.0 will be all for naught.
Level sync can wait, because it has to.