Lets hope a curveball will be thrown.

A Blue Mage Reborn!
Gets an actual Weapon with stats
Gets actual learn rates on spells and possible some gear to boost that (like they had in 11)
Gets an actual Party role

Just rebuild from the ground. Scrap everything about the current job, as much as some people invested days into it so far, i know personally i'd be ok starting at level 1 with an Actual usable job.

I know my go to is "make it like 11" but seriously, Blu in 11 was designed really well, probably the most balanced it was in any FF game.

And before anyone says, "this is a different game" almost all of the ideas for this game were drawn from other games. They already proved that Blu in its current form Physically works in the game, now just rework it to fully fit in the game.

They keep distracting us by adding "new" jobs, which mimic existing jobs, they had a Great opportunity to make a unique job with Blu, and they just botched it.

We all know they were man enough to Admit they screwed up with 1.0 and we all admire the changes they made with ARR. This would be no different.