That is indeed a lovely trailer! Well edited and art directed!
As for the 3D, OLM has done one thing right that D-rights never really tried. A great 3D animator won't find his/her skill set pushed by animating a beyblade. It's just a 3D model (not a great one either, but it's covered in motion blur 95% of the time, so who notices?) that rotates ad infinitum on one axis, and is keyframed along a motion path. No rigging, no deformation… Pretty simple. But the camera's animation is an opportunity to show off the advantages of 3D, and that's what I saw in this trailer that I never saw in MFB. Movement in Z space, full rotations, very dynamic and fluid. That kind of work becomes a labor of love for a very detail oriented person.
"...I am a graveyard that the moon abhors..."