Except ff11 was balanced because every other caster had to pay an arm and a leg to have all of their spells, whilst blue mage didn't have to spend anything but time (albeit a lot of it) where in 14 other jobs don't have to scrape their poclets for their abilities and won't end up in dungeons without their skills like in 11.

Therefore blue shouldn't be treated the same, and they shouldn't hold how the job was last done over every other iteration of it where the job was more about USING enemy skills to be a unique job, not in HOW YOU OBTAINED the spell, seeing as they're mostly different means of obtaining depending on the game.