Can you provide some examples from that VERY VERYYYY interesting design?
I don't want to die dumb.
You're a bit too aggressive for my taste, but okay.
However, I don't know you and don't know a perspective from which I should address the question. Should it be "why Dark Souls 2 is unique as compared to video games in general" (and I think Dark Souls 2 does things that no game had ever done), or "as compared to other games in the series" (and again, Dark Souls 2 is quite unique in this sense). I haven't read the thread, but a quick peek at your post and Dark Matter's post was enough to conclude that you guys are discussing the series from both perspectives. I'm not particularly interested in writing an essay, though, you know
I'm open for suggestions. You may be thinking "DS2 has the worst map design in the series", or "DS2 story makes no sense", or "DS2 is a game for babies, adult men play Bloodborne". I will be more than happy to address these issues
A quick answer is: the strongest point of DS2 is it's story. It touches really interesting and abstract ethical themes. The new director cut out meaningless crap from DS1, and introduced new themes. If there ever was a book that accurately reflects the meaning of the game it would be very similar to "The Myth of Sisyphus" by Albert Camus. Some actually tried to explain these things before me, so you can read about some of the more sophisticated themes in the game here:
http://killscreendaily.com/articles/beginners-guide-kierkegaard-dark-souls-2/ Now, what I've been describing as more sophisticated themes and general refinement of the game is of course reflected by the design. Roughly speaking, the game is more humble, because they cut out a lot of bad and bombastic design, and focused more on the story. So, for example, the last boss is no longer just a guy who stands still in one place the whole game and has nothing to say what so ever. What seemed like a cool idea for the Kiln (at first sigh it looked like an actual place in the world) was devastated in DS1 by a bombastic approach to design (in reality the area looks like "another dimension" type of crap). These mistakes were replaced with characters and plot that remind such classics like Macbeth or Oedipus in DS2.
That's just a tip of the iceberg. I'm a huge fan of Dark Souls 2, to the point where it ruined other games for me, Dark Souls and Dark Souls 3 included (as I said, my first impression from a full DS3 run is that they learnt nothing from DS2, and that DS3 repeats the same mistakes that you can find in DS1, but manages to be twice as much of a parody of the series than the first game).