Ok sky long posts...
I'm sorry for rushing you I know what its like to write a Design Document as I'm working on my own game. It's FFTA like but it has different features and story and just mechanics!
I like the 3 different country's and the "Mystery isles". So will ivalice begin as a fully explored zone as I suggested? It would make sense. Are you making it a physical prototype? I've been reading a book (I really wanna be a designer hence the numerous ideas) that says physical prototypes are esential. A chess board with some extra pieces to boost height would make an excellent field and some miniatures would do fine (Or coins with arrows).
So does the Judges fighting in the war mean to a limited extenet that we don't have to worry about death for the most part?
Small suggestion: Make a quest where Goltana decides to save law cards and invade through a jagd.