ANOES 3: Deaths more "realistic" (stay with me here)...
That may sound like a stupid thing to say, but consider this:
Beginning in #3 and through the remainder of the films, Freddy's kills became less "slasher" and more dream like. In 1 and 2, Freddy's kills were slasher kills and the kids all died as though a slasher hunted them down and killed them where they were. And granted, Freddy's glove is an awesome cool weapon so of course the early films should put that to use. No complaints here.
But eventually they had to get to the heart of what Freddy really is. A guy who kills you in your dreams. And in dreams anything can happen. And where anything can happen, anything can kill you. In a colorful array of creative ways! So in a sense, that makes the deaths more "realistic" (though not based on actual reality, but rather what really happens in dreams). My only disappointment is that contrasting humor of what can sometimes happen in a dream, sort of takes the edge off the horror. I would like to have seen those dreams be a little more creepy/eerie.