Ending Fatigue: The end of the movie is divided into three epic battles (Heihachi, Kazuya, and Jin crashing through every floor of Kyoto castle, Devil Kazuya and Devil Jin fighting above the ruins of the castle, and Heihachi tapping into the ancient Mokujin power sealed beneath the castle).
Moral Event Horizon: Crossed by Heihachi with his mostly fatal experimentation on an entire high school class.
Also crossed by Kazuya when he stomps Alisa in half just for the hell of it. Hey, he's more of a monster than Heihachi in the games, so he had to cross the MEH somewhere in the movie.
Narm Charm: Lee's entire existence can be summed up like this. And it is glorious.
So Bad, It's Good: To many fans, the graciousness with which this films twists the Tekken universe around a silly schoolgirl story makes it worth of view despite its many shenanigans. At the very least, Namco's more direct involvement made the movie much more faithful to the games as compared to the previous films.
They Wasted a Perfectly Good Plot: The story with Shin doesn't really go anywhere and at most is just a Red Herring to lead up to the three way fight against the Mishimas, which considering their deep rooted hatred, would probably be less effective than Heihachi just calling the other Mishimas out to fight.
Wangst: Shin's Who Wants to Live Forever? really does come off like this. While it's a valid trope, it's usually done with older characters who have lost loves ones or something. Shin is just really, really emo.