I'm seeing people bring Demon's Souls into this, and I don't think that Witcher 2's combat even remotely touches Demon's Souls. I think that it should certainly aspire to be like Demon's Souls, but for whatever reason it simply cannot.
Here's my reasoning:
When I died in Demon's Souls, it was my fault. Every time. I beat the game, I got through, I beat it a few more times and I was much better AT the game as time went by. I actually became skilled at the fighting system.
When I die in the Witcher 2, it's often not my fault. Something didn't work, or I wasn't perfectly stationary when I tried to block, or I couldn't get the sword out in time, I suddenly had the wrong guy targeted, or Geralt for no good reason took a leaping jump sword out-stretched into freaking nothing behind him.