Quote Originally Posted by NoctisXV View Post
"Taking inspiration from previous FINAL FANTASY titles, the blue mage job will provide a unique solo gameplay experience in which players will learn monster actions and advance through blue mage-specific content."

Source.
Which means you get those abilities in duties, instead of randomly gobbling on mobs in the open world.

That is a good choice, really. Imagine the crowd looking for specific mobs. Pure chaos.