a) 3D touch is not exaggerated. I have spent a few days with the iPhone 6s and it is a game changer for future mobile interaction. It is very reminiscent of contextual menus and in a year once all developers get on board (and they will thanks to Apple's excellent iOS9 adoption rate) it will be hard to use any phone that doesn't have it.
b) There is no need for new hardware for the Apple Watch. I have one. Every problem with it is software related. Many animations are superfluous, the app strategy is misguided, native apps are still too slow (yet Apple's apps are fast), the watch faces are not nearly customisable enough and it is not situation aware enough.