There's only two, but they're reasonably important.
- Revenge: Damage done by this ability (base and scaling) increased by 50%.
- Rampage: This effect is now passive instead of being a proc from critical strikes.
The Rampage change, on the other hand, is what the ability always should have been. While a talented Leader of the Pack will still be better with its healing benefit, Rampage is now exactly as good as the baseline ability. I never understood making Rampage, an ability you have to spend quite a few talent points to get, inferior to one 10 points cheaper. Sure, it's nothing that's going to make or break the spec and it really should have been what we always had, but at least it's finally here.