Some criticism:
Weapons no longer feel unique, they are just palette-timing-swapped. In DaS1 they had at least one special move.
Designs lack elegance, the Miyazaki interview comes to mind (
http://imgur.com/zO6CcDq).
Most bosses suck ass, some are cool.
Nah, lots of weapons have unique movesets, or at least varied ones. The twinblades for example, heide's sword (I'd kill for another weapon with that moveset without the shitty split damage) and some oddities like the archdrake hammer, which is classed as a great hammer (and breaks poise and shields like a giant club) but has the moveset of a halberd.
There are simply so many more weapons that there's more overlap now, but there's more variety too. And the fact that you can infuse elements in special weapons is awesome (albeit rather pointless in most cases, no way in hell I'm going to make a weapon split damage between 3 elements or add poison or bleeding or poison to a heavy weapon.)
As for bosses, I feel like they've done a better job this time around. Yeah, lots of them have generic sword attacks, but what else are they going to do with a sword? Still feels very different fighting pursuer dashing around compared to other ones for example, and lots of fights have interesting terrain or multiple enemies. And there are so many more bosses it feels like a lot more variety even among the duels.