Kangaroo

They should add a kangaroo mob since a group of kangaroos is called a mob, and it can add more to the savanna and mesa. (even though they just added a armadillo). kangaroos could spawn in groups and be neutral mobs that eat a new type of berries that spawn in the savvans. They can also have babys and will attack you if you get in a 3 block radious of or if you hit a kangaroo.