WM+ is not the saviour of the Wiiremote. I don't disagree with the conceptual idea that it will make things harder. Some games won't be better with WM+. The biggest failing of the Wiiremote isn't the accuracy it's the developers. Even Nintendo really hasn't done a great job on some of the controls.
Conduit for example is a pointer shooter. How is extra motion sensors going to improve pointing? It can't. Maybe they have some little mini input with tilting, but tilting wasn't bad in the first place.
God Father: BE, this game was marvelous for it's level of gesture based input. It didn't need a WM+. I also bet that a now more experienced developer could do a better job with a plain Wiiremote than back then.
Games that really suffer from the Wiiremote plague are games that treated the already simple button tap attacks to a velocity gesture. Even worse when it was one button tap sequence mapped to any velocity gesture. Zelda TP is a perfect example of this form of bad waggle. Though at least in Zelda it's not constant, things die or knock back after 2-3 hits.
A new Zelda Wii could instead map directional gesture. If Wiiremote X axis is near 0(horizontal) when X velocity is ## then thrust.
If x axis is at 70(near full verticle) then check for new motions.
Also you can check for duration to add extra damage and slower recovery time. So if velcoty is at 76(max) for greater than 1000ms then +## damage and +## animation recovery time. This way simple flicks will never be more than light taps.
I could go on an on where things could have been done. But developers were lazy slackers.
(you could also use the pointer to gauge power and strike direction by judging speed of pointer. Remember the Wiipointer has depth :) )
Does with mean that WM+ is a bad thing. No not really. There are certainly games where WM+ can make things better. Golf, Tennis, Bowling, accurate sword fighting... Overall though the plague of bad Wiiremote design is on the developers not the controller and the WM+ will not make developers do a better job.