Yeah. Unless Kangaskhan can hop around, it's probably not what most people would imagine a kangaroo Pokemon to be.
This. I'll admit that it's obviously based on a kangaroo, what with the posture, the pouch, the name and all that. I like kangaroos. But Kangaskhan doesn't resemble one enough, for me personally, to want to use it. So I'd applaud another kangaroo-based Pokémon.
Which is also why I don't mind the various cat-based Pokémon. All of them have their own particular flavor. Most of 'em I don't like, but they can't all be Persian or Luxray.