There's some systemic stuff still tied to alighnment, but 5e has been moving away from them regarding how prominent they are. Apparently Wizards were the one who wanted alignment demphasized in the game and I for one like that. But regarding Wyll, he seems like his story is going to be that of a chaotic good person who made a bad deal in a moment of weakness. Maybe it'll turn out he's actually full on evil, but I doubt it right now, given how he's acting. So at this point he seems like our token good companion.