I like the tablet controller, but I do wonder if Nintendo should not have sticked with the Wii Motion Plus as the primary controller? Because the tablet is so expensive, I always feel a bit nervous swinging the thing around - I would have far preferred doing crazy motion control gaming with the relatively inexpensive Wii Motion Plus.
So that is my recommendation for Nintendo - send every Wii U owner a free Wii Motion Plus controller, and target games with it.
And forget about the "core" audience - they are infatuated with frame rates, resolutions and the latest gfx buzz word, Nintendo will never compete, they are gone playing their Jaguar core gazillion gflops consoles. Get back to the casual audience with motion control and family gaming.