“An expansion is not about fixing; it's about evolving,” Diablo IV: Lord of Hatred’s Associate Game Director Zaven Haroutunian tells me. “And if we do our job, they are expanding and evolving toward solving existing problems. That’s a win-win. I look at our teams as being heavy hitters when it comes to this stuff. They're operating at such a high level, and they've got enough experience under their belt where they can do just that.”Diablo IV deb…