After watching Mr Happy's YouTube video regarding the job, he made an interesting comment on a tweet that was removed from the Square Enix Na twitter: https://imgur.com/gallery/AO9jO so apparently they removed it quickly but if the second job will be a blue mage, how will this affect the state of the game? And how could blue mage fit the role of a tank?
Link of Mr Happy's video that might bring interesting points: https://youtu.be/5yet1b5JNmE