Iwata:People’s Expectations Nintendo Keep Getting Higher And Higher

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Zekkyou said:

Skyward Sword’s hate was directed at how little Nintendo bothered to innovate the series. Gamers expect something new and fresh with each literation of Zelda, so getting more of the same was somewhat of a kick in the face.

Skyward Sword's controls  were the biggest innovation for the series since the move to 3D in 1998.