Eh...
I'm positive this review will get downvoted by the fanboys, but it is my honest opinion.
I can't rate this high because in comparison to your past work and standards, this is lacking. In terms of graphics, it just doesn't hold up to waterlollies or the yuyu. The style changed somewhat I guess, and after two years, evolution happens I suppose. If you and others like it, you do. I don't. Or maybe more time should have been dedicated to this. Either way, it just isn't as well done.
In regards to the actual movie, I personally preferred the old type of story line. You say this version has plot where your past work doesn't, but I personally argue that it has less. This movie is simply an introduction, a trailer to the story. Most of the dialogue could have been left out and the point would still have gotten across.
You are still among the most talented people who submit here though. Keep up the good work. My opinion is an obvious minority and I don't expect to be taken seriously. I've never made anything myself and I could be too critical. Most people love it, so you should cater to the larger audience. :)