Now that I have taken some time to allow the themes to gel, I'd like to say that this is the best DBZ movie I've seen so far. Broly, whom was barely developed in the original Broly movie was suddenly someone I could feel a connection with. He's supposed to be the antagonist and yet you give a damn about him. That's good story telling and character development.
tl;dr Broly wasn't a simple minded beatstick this time.