I had a long response typed-out for how this whole BLU situation feels to me, but it's kind of hard to articulate. So I just finished deleting that essay (for another thread, some other time perhaps...) and I'll do my best at just consolidating my opinions with much shorter, to-the-point statements.
I am somewhere between disappointed and dull surprise with how they are handling Bluemage. Disappointed, because (thus far) nobody can ever say "I'm a BLU main" or play it in relevant content with randoms due to restrictions of the status of being "limited." Dull surprise, because while actually letting BLUs collect spells outside of job quests, of course they'd turn around with a big "BUT-" because them leaving it at that would actually require extra work and balancing. One interview with Yoshi-P a while back even foreshadowed this because he didn't know how to make such a thing with XIV's limitations.
I think restrictions they had to impose on their chosen "vision" of BLU highlights the underlying issues they designed themselves into regarding their battle content. The fact that they think BLU as they designed it would have access to too many "overpowered" spells that they're only willing to allow it in largely irrelevant content makes the whole job sound like a glorified god-mode undersized party mode for the duty-finder. It was their choice to give BLUs access to those potentially problematic spells/abilities in the first place.
I appreciate them having BLU be able to go and collect their spells on their own, but if that was the only way they felt comfortable designing the job's identity after turning BRD into an archer-archetype with limited buffs with flashy music-based flair and SMN being delegated to only 3 unique summons (with no new egis of the other iconic summons- even aesthetically, from ARR launch all the way to the coming-end of this 2nd expansion) but suddenly a strong affinity to Bahamut (and only Bahamut)... then as of now I dunno what more to say about them. It doesn't feel like a new job, it's a sideshow that apparently is designed with game-breaking spells and the freedom the job is designed with permits too many possibilities for bad/new players to apparently ruin group content and they don't want to take steps to make stopgates to moderate/prevent it (as of now).