Always a pleasure Sir, Keep up the great blog!
As I understand it, everything to do with Mario and Zelda as Miyamoto has the boss. (Metroid does not fall under Miyamoto.) Miyamoto has placed ‘lieutenants’ to take charge of the series and to raise the new crop of game developers on them. For 2d Mario, he has Tezuka who worked on some of the levels in Classic Mario. For Mario Kart, he has someone there (who is doing a good job as I understand it). For Zelda, it is Aonuma. Officially, Aonuma is said to not be involved in Zelda because more and more people are becoming aware of what he is doing (his approach to game design with Spirit Tracks was ‘bring your son to work day’ with the stupid trains).
From Aonuma’s own words, he said he hated Zelda 1 (he probably didn’t play Zelda 2. But if he hated Zelda 1, you know he’d hate Zelda 2). Aonuma also is unable to play Super Mario Brothers and games like Pac-Man. He says he prefers PC adventure games where you ‘solve puzzles’ and sit back. He became interested in Link to the Past because he could run around cutting grass all day. In this period of his life, he was looking to become an artist in video games. He was very interested in the art these Zelda games did. He made a game called Majestic which flopped in Japan.
Aonuma was involved in Link’s Adventure. To what extent, I do not know. In Ocarina of Time, Aonuma was not responsible for the design. He was in charge for the dungeon layouts and some of the enemy designs (the common complaint about Ocarina of Time, in fact the only complaint, has been the dungeon layouts. Ohh, that Water Temple!).
As I understand it, he was responsible for the design and direction of Majora’s Mask. The game was made in a very short amount of time which is what impressed Miyamoto. This is probably how Aonuma got his Zelda gig. I think Wind Waker was the game Aonuma had complete control over. What does he do? He remakes Majestic.
Since Aonuma’s time as director, the Zelda franchise has mutated into something else. The artstyle is out of whack. The game has no cohesive universe (and Nintendo’s official timeline has been a huge disappointment). The game’s design has radically changed into being a slow paced game about talking to NPCs and doing puzzles. The sword combat has been minimized and even Aonuma removing the sword completely (as it was with Skyward Sword in the earlier version). The biggest problem is that Aonuma has been hiring people who thinks like he does. He has hired artists who think this type of art style is ‘fantastic’ and that mathematician so he could do new special sort of ‘puzzles’. Since Nintendo never fires anyone, the company has his dead weight now.
Someone like Sakamoto is someone who should realize he is not a movie director and should concentrate on his strengths. But someone like Aonuma… I don’t think there is any saving grace in him. This guy has no business being involved in making video games. He is of that rare minority who hated Super Mario Brothers and Legend of Zelda. His tastes in art is not international (so why is he at Nintendo which is about making international games?). His taste in fantasy is non-existent as I doubt he has ever read a fantasy book. My impression of Aonuma is that he is someone who never became a man. He spent his college years making wooden dolls (!) and Miyamoto hired him because of that (which shows bad decision making on Miyamoto’s part). The worst thing is that Aonuma doesn’t seem to have any empathy with the customers. Aonuma fashions himself as a Japanese chef whose destiny is to ’embrace his creativity’, not as a game developer whose job is to sell video games.
The tragic thing is that there is already an established Zelda art style that everyone likes. Look at the non-game art for the NES and SNES Zeldas.

No one has a problem with this art. It is cartoony, but it looks international. Link looks elfin but still a badass. Evil is depicted as evil and not as clowns.
There was even a freaking TV show of Zelda.
This cartoon ran nationally throughout the United States. Like all cartoons, people will find faults in it. But no one complained of its ‘art style’. Link was a swordsman. Zelda was a hot elfin chick. The monsters and Ganon are depicted as evil and repugnant.
The fact that all these cartoons, toys, and graphical representations of Mario and Zelda existed so prevalently in the 80s torches the myth that better hardware is showing off the artistic eccentricities of Japan. What has changed is the people behind the games. The new people hired into Nintendo don’t seem to have grown up and think their jobs is a lottery ticket to this thing called ‘creativity’. When they deal with an established brand such as Mario, Zelda, or Metroid, they deal with established expectations. Nintendo doesn’t get to change these expectations, not Sakamoto, not Miyamoto, no one. If Nintendo doesn’t want to deal with these expectations, then they should make a non-Mario, non-Zelda, and non-Metroid game for a change. Remember when Nintendo made new fantasy IPs?
I’m not going to pretend that I know what goes on behind the scenes at Nintendo. But I do know that Nintendo is not meeting expectations considering the Zelda series. And the problem is never the audience.