They are concentrating on making their game more fun and just because you don't like the ways they do that certainly doesn't mean it's just a gimmick.
Kinda harsh? What you just said could be also said in the following: "What someone decides and says is fun, others are just wrong and can't be fun". In this case Nintendo making the fun and others being not fun? All control schemes just aren't for everyone, not to mention all so called gimmicks (being gimmicks first, then a clever idea afterwards (touch screen control and double screens on the DS for example)). A good example for something not being for everyone is the 3DS's 3D screen. Some people just can't see it and it has nothing to do with liking it or not.
All in all we can just wait and see what we'll have in the future. Some may be great, some may be trash. One thing for sure is that Zelda will sell regardless of how it plays or how you play it. Maybe not after a few failed experiments, but since the franchise is interesting and quite hard in a way, I can't really see that happening.