Please make Blue Mage a normal job

[ADVSS]

A class as side content is still just that, side content. They don't have any reason to do more than that.

And if they want another caster, they could just, I don't know, add another caster.

Not to play devil's advocate, but all crafters/gatherers can technically be called limited classes too. Nothing but side content if you think about it. Completely optional, and can go through the game without even touching one if you don't want to. But very beneficial if you do.
Maybe BLU need to have a reason outside of the Carnival or some mount. Maybe some profitable thing to their use, or something. Maybe give them a trait that increases overworld enemy death drop rates by a high percentage. Go hunting for mats on your BLU I had suggested something years ago for a better way to farm enemy mats besides mug, or sending/waiting on retainers to come back from Ventures. Maybe BLU could fill that role since they already are overworld destroyers. The limited level would then give people incentive to go party up in the higher zones for mats.