I wonder, was the Crystal Tower ever a part of early lore? Some of the developer comments suggests that at least that Dalamud and Bahamut was planned for a different context in 1.0 than how they were ultimately used.

I'm also wondering how much of the Ishgard/Dravania conflict is from original design plans and how much was created after they made A Realm Reborn. Same with Midgardsormr's role in the story.