Regarding Miyamoto's imput, some of these points are debatable.
Majora's Mask is the worst selling console Zelda game being in the 3m range. Then there is Skyward Sword and Wind Waker above 4m. Then there is Ocarina and Twilight Princess above the 7m range, with Twilight Princess getting a slight boost thanks to being released on two different platforms and that makes TP the best selling Zelda game (it's one of the worst in my opinion, but hey sales never reflect quality right?).
The way I see it, Skyward Sword managed to sell more than 4m, which is very reasonable, even if it was probably the toughest sell in the series. It was the end of the console cycle, there was already an immensily successful Zelda game on the same console, it had people criticizing its control scheme in a harsh way, it had a special graphical style that aimed at bypassing the problem with SD visuals, HD was well implemented and had become the norm, etc, etc... This game and Other M were probably the toughest sells and some of the biggest risk-taking this industry has ever seen.
So, all things considered, the 1:1 motion controls might very well have been what helped SS sell what it sold, because people were willing to give it a try and that shows interest in the whole 1:1 sword fight thing. That doesn't mean everyone liked it in the end, but it certainly helped moving copies.
And for Starfox Adventures, same thing here, if you look at how sucessful Rare games were, you'll see a pattern. Especially at the end of the 64 cycle: Banjo-Kazooie? Pretty good. Banjo-Tooie, not so hot. Conker? Not very good. On the other hand, what happened when they decided to slap Diddy Kong on Rare's racing game? Boom, Diddy Kong's Racing, huge success. What happened when they decided to slap Donkey Kong on what is ultimately the Banjo-Kazooie formula, no more no less? Boom, Donkey Kong 64, that's what happened. Money happened.
So they saw a pattern where Rare games with Nintendo licences sell more, even a lot more, than Rare's own licences. Now considering this, don't you think slapping Star Fox on Dinosaur Planet is probably what helped the title in the end? That's probably the case. Star Fox Adventures ended up selling almost 2m on the Gamecube. Compared to the other launch titles, it did pretty well. It sold better than Rogue Squadron. It sold better than Eternal Darkness or Wave Race.
I completely agree though, that Wii Music was an absolute failure, and I'm not saying Miyamoto can't fail. He's not god, he's had his share of failures of course. I can't speak for Sticker Star. I haven't played it yet but it seems like complaints regarding this title in particular are justified.
Sorry that ended up a super long post.