Hm, I really expected more games to do more with the gamepad! Lego undercover, pikmin etc. *shrug* Yeah, that more games don't use it - even first or 2nd party - is indeed an admission of failure, although silent it is still loud and clear enough.
Not sure though nintendo could just cut the pad from the wuu, it would just totally kill the pad for everyone, including the handful of million users of the current wuu. Nobody would use the pad for anything if it wasn't included by default. And releasing the wuu hardware as a re-heated "wii 2", perhaps upclocked a bit like they did with original wii (increasing RAM again is hardly practical though seeing as they aren't even using half of what's in the current wuu) or just in a different shaped box, would be fecking lame and I think nintendo knows it. Wii was a one trick pony that rode the hype wave for all it was worth for a few years and then more or less pancaked.
Wuu was almost as obsolete hardware-wise when it launched as wii was when it launched, and wuu hasn't exactly gotten any fresher since. Devs know that, and they know the hardware would still not be able to run next-gen games or engines, which would exclude the console from any upcoming multiplatform titles. It would just be another lame duck piece of hardware; what nintendo needs to do is a serious re-engineering of the whole system, from the ground up. Dump that shitty old PPC CPU, old, inefficient VLIW5 GPU and hop on the current-gen DX11 bandwagon.
However, that is years and years of work, especially on the software side where nintendo is already really weak. However many resources they commit to a new console system it runs the risk of being bad, with weak system software, weaker development software and bombing in sales yet again. Will they even bother, or will they throw in the towel on the hardware side?
...Like I said, PS4 Metroid would be fantastic.