When I first played the Witcher 3 last year, I would have rated the combat mechanics a 7.5, or even an 8 out of 10. I liked the strategic aspect of the combat, like positioning, signs, potions, bombs etcetera, which must be employed if you're to survive on the higher difficulties.
But with my play through of B&W on NG+, I'd currently rate the combat mechanics a 5/10. Why the drop you ask? I suppose this latest play through of mine has made me much less tolerable of the flaws.
There is no reason whatsoever why Geralt cannot parry or counter an attack by a human two handed weapon wielder. For certain monsters of course it's understandable, as some monsters have such a massive speed and strength advantage over Geralt. But a human? That's ridiculous.
And him being so slow. He feels like an expert human swordsman, rather than an enhanced mutant swordsman with blindingly fast moves.