This game is good. I'm hoping the PC release is a proper port rather than a rush job.
I love the tweaks to mechanics. Parrying and backstabs aren't the end-all moves they once were, and this makes the game require less recklessness than before. Guard break is actually useful, so tanking players in PvP is vulnerable to a quick hit (and a followup critical hit!). With a lot of other small changes (dual wielding movesets, higher equip threshold before slow move, easier-to-wield 2-handers, etc.), the game is basically more viable for a lot more play styles than before. It's also nice to see that spells are less absurdly potent than they were in the first Dark Souls.
My main complaint so fair--a minor one--is that the level design is less stellar than the predecessor. Dark Souls 1 did this wonderful feat where while you couldn't always fast-travel like this new game; all the areas were so tightly interwoven it didn't matter. DS1 wrapped into itself in ridiculously ingenious ways. Also, almost every area you could spot in DS1 you could find yourself getting to at some point. Dark Souls 2 feels like it has a lot more "filler space." There's a lot of lazy skybox areas and the design of areas feel like they were built as levels first and living places second; Dark Souls 1 felt far more like areas were meant to be livable and then decayed into a playable map.
The map design is not nearly anywhere a dealbreaker. Also, the game feels very expansive. I kind of cheated and looked at how far the game goes, and although I feel like I covered what would be a full half of Dark Souls 1, I think I'm only a quarter of the way through if that.
Great stuff.