So I've unlocked the two horde races and played around with them a little bit, and I'm very disappointed.
Nightborne Warlocks look pretty cool... until you start casting and realize that they use the exact same animations as Night Elf. Night Elf channeling animation is so awkward, and their oversized floating shoulders... man.
The Highmountain Tauren racial is also a massive disappointment. Bull Rush works like a really slow roll and about the same distance. You can't turn mid charge and it can't be cast while in the air. You also can't cancel it. You can cast and jump at the same time, but you still travel just slightly less. Also it doesn't stop when you hit a target. Too close to your target and you run right past it. Its so awful, I don't think they even tested this.
They feel so half ass'd. I'm not expecting entirely new animations for everything, but at least a couple to seperate the races just a little in how they feel to play. Playing a Highmountain Tauren feels identical to playing a Tauren with antlers on your head. Slightly changing the swing animations or cast animations, even the smallest amount, would have made a world of difference.