Well, correct me if I'm wrong. The new animation works exactly the same as the old one. The old one was rubbish. The new one is not.
Apple did **** job.
Yes, the new animation is still designed to be interrupted, but they seemed to have fine tuned it so it's one constant speed and the wallpaper doesn't lag behind the rest of the animation. It's still differerent from the iPhone 6s animation on 10.2, but now it's very similar.
They've also made it so all iOS devices use the iPhone 7 animation