This.
I really, really enjoyed the animation. Apart from the roadrunner legs, which was pretty terrible, I think most everything had its place. Sure, it was super over the top, but it's such a welcome change of pace as far as I'm concerned. I even like that picture of Pein, it's just such a total mindfuck considering the emotionless bastard we know and love.
This style isn't always pretty. It's very fluid, but its randomness is not something everyone appreciates. It is something done to capture attention and it's in the same vein as the eternal anime staple of the distorted face/blank eyes/exaggerated expression, just on a more realistic scale. I guess I just like all that crazy shit, I did enjoy Kaiba.
I feel differently as it relates to the story. As stated, things weren't at this level of chaos in the manga, so Tendo wasn't catching death blows on a regular basis. It makes no sense for Tendo to survive all that after the other Paths of Pein were dispatched with a fraction of the effort. They are just corpses, after all. Tendo getting hammered into the ground was cool, and another thing I thought was really funny was Tendo going Bruce Lee on the Kyuubi's rock projectiles (2:48).