Taken from the patch notes:



Playable Content
Level 30 job quest requirements have been adjusted as follows:
Before:
Players must reach level 30 with the job’s associated class.
After:
Players must reach level 30 with the job’s associated class, and have completed the main scenario quest "Sylph-management."




Do you realize what this does for the game? It seriously slows down hinders certain bot/rmt activity. They won't be able to unlock jobs. They won't be able to use the i90 gear. It won't stop everything, but it's a nice thorn in their sides, haha.