Add Blue Mages Already

[Tanathya]

Dual wielding swords alone is not a blue mage trait, but combined with that sort of spell set, it's too similar to not be a blue mage.
Just like how Astrologian is too similar to time mage.

And I'd certainly welcome a blue mage that uses other weapons, (in fact my own proposed blue mage interpretation uses a gunblade) but if this class were made, then we would not get a blue mage period, dual wielding or otherwise, because there would already be a class too similar to it.
Too similar to include a separate blue mage class, not similar enough to appease blue mage fans.

I'm not against the idea of this sort of class, at all. But because of it's similarity to blue mage, it would be pointless to deny that similarity.
That should be embraced instead, make it a full on Mystic Knight/Blue Mage combo, like Astrologian has embraced time mage.

Not necessarily, they could very well make it a gun mage, much like they did in FFX-2. Or something new, since BLU is, again, the most flexible job of the whole series by default. That's the whole point.