Implement Bestiary? Not terribly important but a neat idea
I was thinking, wouldn't it be cool to have a bestiary record in one of the menu options, that records all of the different types of enemies that you've defeated, and how many times? Maybe it can also show the locations that enemy appears in, as well as other information, such as elemental weaknesses, etc.
edit: lol I re-read my post and the first thing that came to mind was.... Pokedex
edit again: Oh! Oh! And what items they drop too ;)
last edit: now my idea is just going wild... lol they might as well just implement an in-game encyclopedia with all locations, monsters, items (with features like what monsters they drop off, things like that), SYNTHESIS RECIPES.... keep in mind all of this is only updated to what you have discovered yourself. I think it'd be awesome xD