I disagree.
Bethesda may have its own problems, but it didn't get to being considered one of the top devs in the industry by completely sucking at EVERYTHING. Nintendo could and should take a few pointers on world building and deeper play mechanics. My biggest problem with the last few Zelda games is how ultimately shallow they end up being.
If you go back and look at what actually is in all the Zelda games, you'd be surprised how off-the-mark your post is. The Zelda games do exemplary work in terms of world building if you devote your attention to the NPCs and sidecharacters and their individual stories or backstories and how the world is laid out with the people in it.
And I don't get the part about deeper play mechanics. Do you want stats? Raise elemental defense by 12?