Every reason as to why they claimed BLU shouldn't be allowed to play in DF content at level 70 has been proven false within a day, good job Square.
Overpowered abilities? I count one, White Wind is bonkers, and that's it. 1k Needles drops off drastically as mob hp increases, and most other abilities are complete garbage. Bosses are immune to the majority of BLU shenanigans like Petrify and Sticky Tongue, rendering Yoshi's "hurr L5 Death in O12S lul" comment completely moot.
They might have no skills going into DF, yet you make specific abilities mandatory for the job quests? So you're saying you could lock job quests behind having a specific set of core abilities that are actually balanced around party play, and then open up the relevant DF options upon completion of job quest milestones? You can have that one for free SE. You're welcome.
They're designed as a solo experience, yet it's mandatory to go into instanced content with other players to learn certain abilities. That one is just ass backwards, and I highly doubt an i130 level 50 BLU is gonna be able to solo Shiva Extreme to gain her bow skill, let alone kill her before she enrages considering how garbage most skills are.
It's a complete mess, frankly. They've done it yet again, said one thing but done another. Either make it broken OP as you claimed and keep it limited, or balance it around party play and offer it as a complete job. Not this weird hybrid of garbage ass skills where 50% of them come from instances that you're probably not going to be able to effectively solo, despite that being the entire point of the job.