Reduce the chase and be more selective in the zone and take more walks. I also feel like sometimes he almost jumps when he swings and it's probably hard to hit a ball that hard when your feet arent sound. A steeper bat path and more intent behind his swings on meatballs would probably produce a better ISO but would also result in a lot of can-of-corn flyballs, affecting his BA. I don't know, I feel like he's too well-built a dude to have such weak contact, though.