The puzzles are not supposed to be hard for humans with a functioning brain to solve. They are there to stop the drauger, whose brains rotted out of their bodies long ago. There is a book in the game that describes this.
I love the dungeons in this game. I am the kind of player that prefers an excuse or reason to go into an area, rather than just barge in. So, I eagerly await the next quest that sends me to a dungeon. After I have done about half of them, then I will just go exploring. As by then, my excuse will be that I need to fill in the map.
Which is humorous, because sometimes after I open a puzzle door, there's Drauger on the other side!
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That being said, I like that there's a purpose, an objective for going into dungeons now. A shout word, some sort of weapon or armor that's worth it, etc. The puzzles give it a Zelda feel to it, without being Zelda. I think it's a great thing, honestly.