Too much drift in the animation. A common flaw of CGI. Would've been better like Pixar's pose to pose.

Also the lines of action are weak. Possibly due to being 3D, but that shouldn't really matter if they're strong.

Both of these are evidence of relying on computer interpolations for in-between key frames.

The toon shader is okay but there's no thick or thin line quality to speak of that was in the classic toons.