Some recentl released gameplay footage for Soul Sacrifice Delta from TGS. (I don't think it's been posted here yet)
Some new things that i saw in the video:
-New Spells and Monsters (obviously) (the elevated terretory and that phoenix spell seem nice)
-More character customisation (the original was kind of lacking in cosmetic customisation so i like this)
-A new choice to Save/Sac (I don't really know what it does but from the vid i'd guess it randomely saves or sacs)
there's probably lots more that i didn't see or understand in the video so feel free to add