I was watching that end scene hoping he would march up with a bow, or get like a special bow-staff so we'd have our first representative of a true arcane archer in all of FF.
Though I understand why he switched to being a caster, being an archer no longer suits his role in the story.
Also theories on future plot threads...
We've probably learned all we can about Amaurot at this point. Since the story revealed that we are basically a reincarnation of Azem the wanderer, along with the implication of today's societies worshiping an aspect of Azem through similar names like Azyema and Azim, I think the story leading up to the expansion and beyond might move into the topic of other ancient societies and how Azem left their mark on them.