I'm not sure what you mean by "sexless" -- just that he's not having sex, or that he's without sexuality (i don't mean orientation)... because I remember several things about his character lusting after other guys. If he's trying to get away from playing an awkward nerdy teen who doesn't get laid, I don't think Evan Hansen will do much for that. That being said, it's an incredible role for him and he should absolutely do it, and it will strengthen his career.