Let's keep a couple of things in mind here.

Miyamoto is credited as Supervising director on Star Fox Zero.  The only other game he's credited in the same way is Mario 64 DS.  Seems like a minor role.

Miyamoto is not credited at all in Sticker Star.  And the only thing we knew he did was deemphasize the story.  But the story wasn't the problem, the problem was that the gameplay was completely broken.

Miyamoto has been credited as the designer of only 4 games in the last decade.  Super Mario Galaxy, Steel Diver, Wii Music, and Wii Fit.  So, one mega hit, one of the best reviewed games of all time, a fun diversion, and a piece of shit.  Not a bad track record.

Miyamoto is credited as a producer or supervisor on... Smash Bors Wii U., Luigi's Mansion Dark Moon, Splatoon, Mario Kart 8, Skyward Sword, Mario 3D Land, 3D World, and others.

So, my conclusion is that it's hard to really tell if Miyamoto has lost his touch.  He's involved in a huge deal of projects, and how involved he is in each is hard to say.

But, to say he's losing his touch based on a suggestion he made on a game that would be broken with or without his input (that he wasn't even involved with enough to be credited) and one other game is pretty darn stupid.

One of best Nintendo games of this gen (Pikmin 3) say hi.

Bears repeating. Sums it up pretty well, imo.

Yes, because

- Directing/Producing a video game is very labour intensive. Level design, gameplay mechnicals, graphics, motion capture. The concentration and focus required is not for the elderly. 

- You have to be constantly up to date with the latest technology. Something elderly people arent particularly good with. 

Impressive image, says a lot not exactly about Miyamoto, but indeed in regards of Intelligent Systems and its recent treatment to the Paper Mario series.

I think the man is still capable of delivering excellent stuff. Pikmin 3 (which hasn't been so mentioned around here) proves this, but after the Wii Music fiasco, the Paper Mario thing and Star Fox Zero, he obviously isn't that devoted to his job, anymore. Bad stuff wins 3:1. 

Back in the day he also used to bring new stuff constantly. Now, even when his responsibilities with classic Nintendo franchises like Mario and Zelda are practically over, I haven't seen him very active.

But in the end, this was inevitable. The guy is getting old and Nintendo's philosophy (especially during Iwata's term) may have influenced importantly on him.

When i read this post i ask myself did kerotan even play any of the paper mario/star fox or even pikmin 3 games? Then i remember post like this dont make sense when they dont even know what they are talking about smh

Edit: i dont think he even made sticker star. That makes what many wrong with his out of touch approach. 

Miyamoto had very little to do with Pikmin 3. It was directed by Shigefumi Hino and Yuji Kando. 

I've heard and seen gameplay, but I don't properly judge games unless I try them myself. People crap on SF0, but I played it and I personally don't agree with what they said. It's not bad of a game, I got used to the controls and the gameplay was actually fun. We can only have a good idea of what we think of a game through previews, but can't judge fully until we try it. I don't know if Federation Force is gonna be bad or good even with the previews because I haven't played it. It's like watching movies, tv shows, reading books, or experiencing other media. Again, that's my philosophy when it comes to entertainment media, you don't exactly know until you try it (of course there's exceptions on other things like drugs and alcohol because they provide greater consequences).

Youre contradicting yourself. If you think he had some involvement in other projects such as amiibo festival or federation force, there's no way in hell he wasn't involved in Pikmin 3. He had endorsed the game, he leads the team involved in the game, was involved in the development of the short movies, etc. 

Miyamoto HIMSELF said he was the director of Star Fox Zero and did with the game what he wanted:

Miyamoto: Well, I am credited as both producer and supervising director, and I’d say that what I did was pretty close to working as a director.

Sao: But when you play the game, you can tell that you really enjoyed working on it.

Miyamoto: Right. That’s because I just did whatever I wanted! (laughs)

I am 100% sure the other director(s) were forced to listen to Miyamoto. Platinum Games would never make such poor control decisions. Why would he lie about his role in SF0 in the first place?

He murdered my favorite series, to the gallows with him!