Since Wii U failed, what should Nintendo have done to follow up the Wii's success?

[Skullwaker]

Different name, better marketing, more powerful hardware, have the gamepad be an optional peripheral rather than the main focus, better launch games (NSMBU was a nice start, but a big name like Metroid or Mario Kart would've helped a lot), better push for third party support, less droughts, etc.