Backtracking in General
Most of you hated the Temple of the Ocean King. Revisiting the same dungeon, having to go through the same areas you already completed, only to get to the new stuff. Well, that's what Skyward Sword's overworld is. You go to these zones, complete your objectives, move on, only to come back later - at least two more times each. And most of the time, you have to cross the same areas again just to get to the new parts. You see, in previous Zelda games, you went to new zone, and you usually didn't leave it until you had made your way through the entire thing. Sure, sometimes it meant going back somewhere to get an item before you go go ahead, but you weren't going to new areas until you completed that zone. This ties into that density argument, too.