Forgive me for the late reply.
Anyway, I'm not just talking about the simple animation where the player characters make a simple slashing animation, I mean just pressing the attack button without that unique swing animation playing. Now, don't get me wrong, the powers are still very fun to use in the second game; I just don't care for the changes made for Dark Vision, and while it's nice that D2 Corvo's Blink is basically Daud's, with the addition of being able to teleport kick people into oblivion, you can't Blink down from a high distance as you can in D1 (at least, not safely), so it somewhat makes Blink not as useful for traversal as a result. By the way, it's weird that characters don't have any death sounds when these animations are played out. It's a strange audio error that I noticed when I went back to the first game after D2, because characters still have those sounds played when they die, regardless of how they're killed.