What I don't get is how people believe the WiiMote is somehow nothing but waggle. It's not, even with the vanilla version, the Wiimote is able to detect basic gestures on a 3 axis angle, as well as bank and pitch (or tilt). And I don't even need to bring up the pointer. Games like No More Heroes, MadWorld, etc. show the Wiimote is capable of more than random shaking.
The issue people had was that the hype of games like Red Steel led people to believe that the Wiimote was capable of 1:1 sword fights, when not only did Nintendo never promise such a thing, the technology to do so wasn't cheap back in 2005/2006. The Wiimote is great for basic gestures, titing, and pointing motions, but anything more complex than those and it has trouble. The mistake developers made early on was that they tried to combine X/Y axis gestures, with bank/pitch positions to create "pseudo" 1:1 motion controls. This was problematic, as the two functions are done by the same accelerometer, which made it very difficult to create the intended gestures. And even if you do successfully combine them, it's once again, still limited to basic movements such as lobbing a tennis ball in Wii Sports.
Motion Plus fixed this issue by having a gyroscope, which allowed the Wiimote to more appropriately capture complex gestures. As for Waggle, well that's a by product of the Wiimote's limited button layout. Combine that with developers initial lack of knowledge about the Wii Remote, and it was used as a lazy Band-Aid solution to problems with much better answers.
If the rumors are true, then NX will have none of the initial problems of the Wii since technology has progressed at a fast rate, making more advanced motion gaming very cheap to produce.