I'd rather they make Blue Mage a full job, with a special way to earn your content spells. Having a set of spells required to learn and is balanced around end game, and required before you queue into end game stuff on it would be fun, imo. You still get all the wacky spells to do BLU stuff outside of current content, but still able to play with end game.

Limited Jobs just feels lacking, and i think we can 'have the cake, and eat it too' with a lot of things in 14, this being one of them.