I finished BotW yesterday. It is the most casual, most MMO-like, most ambivalent Zelda so far.
It's a nice open world sandbox with a mediocre game on top.
The story is rather meh, the NPCs either underused or forgettable. The balancing is bad. Of the 120 shrine dungeons (I did them all), only about 15 are good and a bit challenging, most of the (puzzle) shrines can (literally!) be done in 2-4 minutes.
Of the divine beast dungeons only the Divine Beast Vah Naboris (Gerudo) is great. The Goron and the Rito beast are especially easy and underwhelming, they can be done in under 20 minutes each, including bosses and all chests.
Speaking of bosses, all major bosses combined (divine beasts and Hyrule Castle) I died just a single time. Once you upped the armor a bit and have the right materials, cooking & fairies make you pretty much undieable (with Lynel fights maybe the exception). I think i didn't die at all the last 30 hours of playing.
Hyrule Castle was a complete letdown for me. It nothing like the dungeons from previous Zelda games, where you needed skill and some wit to progress. Actually I accidentally stumbled into the final fight without ever setting foot inside the castle before while searching for a memory. I decided to try fight Ganon for a while and was a bit surprised because had him almost down in no time and then decided to load an earlier save in order to finish all shrines first.
The english voice acting also stands out a bit on the negative side. Why did they use only 7 voice actors? Every other language uses at least almost twice a much. It's really distracting that Zelda and Mipha have the same voice.
What bothers me about the game is, that it establishes a lot of game mechanics but they are barely used for anything important.
I also wonder why BotW is not compared the "Ubisoft formula" games a lot more:
Climbing towers to reveal map? Check!
Randomly placed outposts with respawning enemies? Check!
Collectibles anywhere? Check!
Breaking weapons? Check! (FC2)
Weak main story? Check!
Filler sidequests? Check!
Let's drop the Zelda nostalgia glasses for a bit. I would say Nintendo has really out-Ubisoft-ed Ubisoft here! Yet Ubisoft is criticized while Nintendo is praised for exactly the same things!
That said, the game has it's moments. My favorite moment was when I bought the Lizalfos Mask mask, equipped it and then walked up to the first Lizalfos. Hilarious! Some of the cut scenes are really great. It's fun to figure out the game mechanics.
I would give it a 7/10.