http://www.pcgamer.com/the-witcher-3-enhanced-edition-mod-completely-overhauls-combat-and-alchemy/

This is not the Witcher 3 I played. In the game I remember, Geralt whirled and twirled his way through combat, magnetising to the nearest enemy. Combat wasn't always easy, and it did have some depth—I had fun wading into crowds of enemies, dodging and rolling out of the way, and buffing up with potions before big fights. But I was always disappointed with the limitations of The Witcher 3's skill upgrade system, and upgrading gear and the Quen sign made late-game battles less challenge, more race to see how fast I could decapitate every monster or thug in sight. The Witcher 3 Enhanced Edition does not play like that. And for anyone who was turned off by The Witcher 3's vanilla combat, this mod might be just what they need to enjoy one of the best games of all time.

Here's the pitch for The Witcher 3 Enhanced Edition, from the mod page: "[Insert generic sales pitch here.]" Okay, well, that doesn't help us at all. Let me take a crack at it: W3EE comes from a team of modders who couldn't stand the vanilla game's combat, and so they set out to fix it by removing autotargeting, adding new animations, new ways to parry attacks, the ability to control the distance of every swing, inflicting and taking injuries to body parts like the head and legs, and a whole slew of new stats that affect damage, speed, etc. And that's just the combat stuff.