With the London fan festival came a new "job" development. 3.0 is giving a JOB with no CLASS. This to me, gives hope of them trying to fix the class/issues without breaking what is currently made.

Blue Mage is Blue Mage (or any of its other titles across the franchise) the fundamentals of the game is what matters. as to the Q&A pertaining BLU, it does state he wants to do it. Meaning there is a good chance it will be implemented eventually...Its the how to be figure out.
As to everyone going "FFXI" made it be as many are referring to it; there is a reason for that Its an MMO utilizing the Abilities with a manageable way to handle the Ability Bloat they would naturally have.

In FFXI (according to here) has 175 spells for 99 levels and expansions (idk if that includes the most recent, that was just the page I still had that would load) ok, so lets cut that back 75 spells to cover the xpacs after its release; thats still 100 spells at level 75 (the cap it had on its start). By that, we could easily have 50-75 learnable abilities before 3.0, 75-100 before 4.0.

When I stopped playing before the last xpac launched, I could set a maximum number of 20 spells and that was only if I minimized spell costs for the 55 points I had to set spells. I think I only had 16/17 spells because I had several higher costing ones set! so including weapon skills (non grind) and the Blu specials (I'll say 5 to be safe!) I had 12 weapon skills.
So, at 99 a total of 34-38 abilities available to use at a time, and several Weapon Skills you stopped using after getting better ones.
With THAT in mind base with no cross class skills used FFXIV has 33-36 abilities and that includes their traits with a cap of 50!
still think our current system couldn't make it work?