Witcher 2 isn't all so bad. The foremost thing I believe it lacks is the actual "witchering" side of things. It is mostly about an ongoing war and your role in it. Rolls and the Quen sign are more useful than necessary, but I guess a later patch had fixed both issues. That was after I had completed the game twice and left it aside.
In brief, it is good. At least it doesnt have the "click, wait for the next cursor flash, click again, wait a bit more, another cursor flash, click" style fighting from the first Witcher game, which was also a truly cool game for its time but the combat felt so lame.