I really would like to see more dungeons with specific music themes or at least a general dungeon them for each dungeon type (cave type, ruins, etc.) Also it would be great if behest had different music than any other battle, much like how guildleves are different from the normal region battle theme.

Also having Uematsu on board, I can only hope that when true bosses are implemented, the boss battle themes are just as great as all his boss compositions ( FF 1-IX, Lost Odyssey).

EDIT: He really hit the mark with Coerthas theme though.