That's one idea, here's another:

Have Conjurer and Thaumaturge learn more spells than they are currently planned to learn. I absolutely don't want to have to buy scrolls again. FFXI was enough torture on that aspect; gil was hard to make for me, and not being able to perform my job as a mage only because I couldn't afford to buy magic was a legit low blow. Let it not be the same in XIV.