Mike D.
Be great with some more dynamic camera angles and expressive animation. I know there's not a lot you can do in MMD but I've seen some animation and models that topped most RWBY episodes.
I would have used SFM for something like this in all honesty. MMD is a bit more confusing to use in my perspective. SFM also has a much more diverse modeling engine and is easier for beginners. Not to mention the MMD is in Japanese and requires patches for English use (I can only understand Japanese if it's in romaji; speaking it is much, much easier than reading it).