I really hope Nintendo update it, although they probably won't. There are justifiable reasons, such as Wii games and launch games having only some possible mii attributes included, but they could easily patch Wii U games (though this is harder with third parties). They really should have augmented the mii studio options, it was Fun on Wii, but the new version doesn't even have anything new though the 3DS added facial recognition, so it seems like a sort of lazy move, a bit like what the Mario series is in danger of doing (though NSMBU seems to have glitz going in the right direction). This is clearly just a lack of effort on Nintendo's part, because they could easily have launched the Wii U with a new editor and compatible games, and have a separate mii index for Wii games. What I'm hoping for in the future is some 3DS mii Streetpass Plaza Wii U connectivity, so those cool hats can be more than just for that game.