As much as I hate berserk mode moment a.k.a deus ex machina mode, I think it's about time Delphine itself got more focus. One of the mysteries that got me into this series, is "what is Delphine?".
Sure the story about war and politics in this manga is fine, but the mystery behind Delphine existence, and the origin unsorcerer war (the theme from the beginning!) are pretty much buried.