The Bird Statues are a really great idea because if you save with the buttons you get warped to the beginning of something where you are like a dungeon, with the Bird Statues not.
Skyward Sword was better, much more original boss battles and dungeon. In Twilight Princess you have to use your item that you get in that specific dungeon to beat the boss, in Skyward Sword not. You have to use your Loftwing to defeat Levias and only your sword for Ghirahim, Bilocyte and...