Something about Freddy is much more visceral and menacing. The new look for his face is actually kinda terrifying. He actually looks like some kind of demon/monster now. Before, he looked like a human who was the victim of burning. Now, he doesn't even look human.
As for the voice, I'm going to have to hear it a bit more. I'm just so used to Englund's voice that a new take feels odd. However, I think after a few more views, I'll be okay with it.