Dev Team, you screwed up.

[Ilyrian]

I find it hilarious people are complaining that they would have to "ruin" BLU to make it a standard mage job when they made MIGHTY GUARD which is arguably one of the most iconic BLU spells a freaking Shield Oath clone. It's literally just a tank stance you flip on and off. It's the absolute epitome of 'ruining' a spell to ram it in somewhere it doesn't belong. Why isn't everyone who thinks BLU can't function as a real job up in arms about that? It should be the number one post. You got denied a classic spell for a rehashed clone.

Heck, the way BLU plays right now could be made viable for real content if they fixed potencies to not be terrible. Is BLU now retroactively bad because it can be played like a caster? Because it already fits in to the caster role? There is nothing special or super broken about this implementation of Blue Mage beyond White Wind and the ability to troll trash mobs with tail screw or missile. As if those weren't able to be balanced at all.

Then you've missed my point entirely.
I don't really care if they make another caster DPS and call it Blue Mage. But it will still have to function exactly like the rest of them.
Point and shoot - press your buttons in an order. It's not going to be a tank, a healer, an off-tank, an off-healer. It won't provide some mythic utility. It won't be able to replace a healer... it will be its role.
Unless - they fundamentally change the core dynamic of group content. Which, though unlikely, could happen. But I'm thinking it won't.