Sir, level sync is about low-level dungeons. Which is designed for leveling players, typically the newer player-base. So, yes this is the perfect time to go, "...but the NEW players...!" It was designed with them in mind. And plenty of content has been implemented for the current subscribers. I mean, I don't see any new LV15-49 dungeons or trials. Do you? Everything implemented has been LV50. Dungeons, Raids, Trials and even MSQ. Even PVP (which since Wolves Den initial release has only been LV50). Frankly, none of that has been targeting the fresh new subscribers, it's been catering to those already there and at the heart of the game (as I like to call it. See my wall of text about pre-50 being tutorial land).
I don't think anyone here has suggested that new players are brain dead. Just that the power gap is, and will become more, obvious.