One of the greatest complaints levelled against the Witcher series is that the combat, which is a shame considering the excellence that went into crafting the characters and in-game environments.
So if you've been putting off the sequel for precisely this reason, then this is the mod for you.
"Formerly based upon FCR2 during the initial portion of development, it has since branched off and come into its own with a slew of changes," ModDB user 1ndig0 wrote in the description. "[Improvements include] parrying, free-form targeting, focused attack, and combat-based experience points to name a few. Most of the new abilities are acquired through character ability development."
The level cap has also been extended to 96, allowing players to unlock every single item within the skill tree to truly become a master witcher. The full download is just over 41mb and you can find all the instructions you need here. And as always, backup any necessary files before modding.