Beats me if I'll have another underworld/sky travel element integrated into my next quest. I'll start thinking about one, though.

And trust me when I say that the quest will get more difficult. A lot of the difficulty in the last few dungeons of the game is due to... nah, I'll let you figure that on your own. Wahaha.

I'll just say that the last 2 dungeons are... pretty long.

EDIT: Yeah, Level 7 is long, Level 8 is meh, and Level 9 is more than decent.