Dev Team, you screwed up.

[Dualgunner]

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.

"Point and shoot, push your buttons in an order." Congrats, BLU as it is right now fits that description. Please acknowledge that the three casters play very differently from each other, despite that they work toward the same goal.