Blue Mage: Are you kidding me!?

[Lambdafish]

And the problem is????

Surely, BLU mains, would accept this, which is why they decided to main BLU instead of any of the "Normal" classes.

Clearly you haven't met the community. There would most definately be "Why do I have to do this" threads and complaints. As you point out in your comment, BLU isn't a "normal" class, which is why it is a limited job, a brand new way to play the game based around certain constraints that previously prevented jobs that people wanted in the game from being implemented.