Well, unless they are showing an old build, I won't put your hopes up that they will change much in the last three months before the release date. Bugfixes maybe, but combat mechanics is something you don't plan to work on this late. In any case, I found the Witcher 2 combat easily servicable and from an early hands-on it is easy to judge the combat, but you might just be doing it wrong. Wouldn't have described the Witcher 2 combat as clumsy anyhow, it was very smooth and responsive, the mechanics were just a tad bit dull and roll-oriented.