I was thinking about disk swaping from the FF13 thread, and when going through game disk swaps and how they identify 'chapters' in games I realized that I didn't really think of the time between the start of Disk 2 and the events at the northern crater as 'Disk 2'.

If you think about the general themes in each disk (excluding the section in question):
Disk 1:
- Following Sephiroth around
- Path of travel governed by geography
- No immanent threat to the world

Disk 2:
- Changing objectives
- Highwind allows access to entire world
- World in peril by Meteor

From these generic themes it seems to me that the City of Ancients -> Northern Crater sequence its in far better with Disk 1's themes. Thoughts?

(I'm going from a narative point of view, and ignoring the fact they probably couldn't have fit the extra data on Disk 1)