I've read none of his earlier stuff, although I'm pretty sure I've read Gerber's stuff in Defenders, and am passingly familiar with his trippy esthetic. I'm not feeling that particular vibe here, so you might not be terribly into it.
He's definitely portrayed as a potential global threat here, so there is that, at least.Man-Thing is dangerous. “Whoever knows fear burns...” Man-Thing has burned quite a few monsters and demons, even going toe-to-toe with Dr. Strange and the Hulk. That’s no joke.