While I find BoTW to be one of the more challenging Zelda games in general,  the Divine Beasts are some of the weakest and easiest "dungeons" in the entire series. Even the boss battles with exception to one so far have been underwhelming.

lol Yeah, the armor in those games are pretty bad.

I wouldnt even call them dungeons. Which is great for me since dungeons are usually my least favorite part of the Zelda series, but I can see why people would want more than what BOTW offers in that regard.

I've played about 30 hours, done 28 shrines and 1 dungeon, Wii U version. I only really have minor gripes. I would say:

- Lack of labyrinthine shrines/dungeons. I don't mind they've removed the item based progression of earlier games, but I would love to see a dungeon or shrine of considerable scale and complexity. Maybe I have yet to uncover that, though sneaking around Hyrule Castle to do sub-quests suggests that the final dungeon at least is large, with plenty of optional exploration there.
- Frame-rate slowdown in villages. Not a huge issue, but noticeable slowdown in every village area I have encountered so far. Worse in Hateno/Kakariko than it is in Zora's Domain.
- Lack of enemy variety. Again, not a huge issue, because generally I think the combat is exciting with enough room for invention to make up for the lack of enemy types, but it's a shame not to encounter dodongos, Dark-knuts, Iron-Knuckles. Especially because they've done a great job of bringing Lynels into the 3D series, it'd be nice to see them take that approach with a wider variety of enemies.
- Similarly, lack of boss variety in the overworld. I've encounted several Hinox and Tallus, and one skeletal enemy, and have heard there's a fourth kind of boss (possibly in the desert?), but boss encounters in the field were a big source of excitement for me. Again, there's a lot of existing enemies they could have brought in as one-off encounters in different parts of the overworld, like King Dodongo, Manhandla, Gleeok etc; not to mention some more new types.

Broadly, though, these issues haven't really diminished the game in my eyes. The latter two points could be addressed in dlc expansions, too, and it's interesting that the Christmas expansion promises a new dungeon. Perhaps a grander labyrinth is planned?

Same here. Although it is nice to see variants of enemies with highers stats, the game suffers from variety.

I beat the main quest today. I have to agree with others that the boss is somewhat underwhelming, but the actual final dungeon itself is awesome. Now I am going to finish up shrines/side-quests.

Tbh I'm glad BOTW dropped dungeons to make the world more of the focus, before dungeons where the main focus of the games with the exception of SS and MM which meant if a game didn't have top drawer level dungeon design they suffered. BOTW dropping them is a key reason why it's well received as it's made the areas you spend the most time in (the outside world of Hyrule) the interesting point of the game.

Future games will now focus on how the next incarnation of Hyrule will be rather than what dungeons will drive the games.

From here on out I kind of want the dungeons to be natural parts of the overworld where the transition is seamless. The closest thing to that was Snowpeak in Twilight Princess. You are one second in the Yetis house and the next second in a dungeon. A Hyrule like Botw's with that sort of dungeon transition would be pretty awesome. Although I did like how dungeons were done in BOTW, just wish they were a little less recycled. 

Having good gear and equipment should make the boss easier.  It shouldn't make him a pushover.  

Spoilers:
- Death Mountian is always the same (rage beast makes mountain erupt)
- Do not like the kid that helps me in the Vah Rudania beast.
- Anticlimatic (even missable) Master Sword and Ancient Arrows.
- Dungeons are short, no keys and bosses are easy.

But, I love the shrines!