I have to disagree that the main problem for the Wii U is the gamepad. The main problem is that the casuals that they appealed to with the Wii, and were trying to appeal to with the Wii U, are mostly gone. The majority of gamers left are core gamers. And since they already have a PS3 and/or 360, this gen they are looking for an actual leap forward in terms of power. Not a console that is around the same as their old console.
The only thing I can think that would really boost the Wii U is to drop the price by A LOT. Like to $200. I think this would make it cheap enough for some to purchase it as a secondary console, as it does have some appealing exclusives. Of course, this isn't going to make sales explode by any means, because of the reason above. And it appears it is off the table as far as Iwata goes.
