I liked that the AF3/weapon/final ability are attached to Job quests now but I feel sort of bummed that there's no explanation for any of it. Even the AF2 had some information from Seika.

It's not explained how we get our final ability either or what it really is. For example, why/how can Summoner finally summon Demi-Bahamut? What is Demi-Bahamut?
I guess it'll all be explained in the next lore book but I wish there was a way to learn about it noooOOOooow (