Yes, his technique is still lacking. But he's 21 years old, and has basically fought most of the heavyweights in this league already, and didn't get destroyed (against Oliver maybe). He's only going to get better.
He'll have a short career because he cannot play hockey.
He's going to be a good 4th liner, because he can actually skate. It's kinda ridiculous really, when you see a guy that big that can actually move relatively quickly. Just like with his fighting technique, he's going to improve his understanding of the game.
He's going to have a long NHL career, I can guarantee you that.