Can he defend? Would he be a good defensive 4th line player who occasionally pops a goal?
His best chance at an NHL career would be to transform himself into a checking line player who uses his speed as an asset, good forechecker who can provide offense as it occurs without pressure to produce on a top line (which he has failed to do). But I've seen absolutely zero growth in his game in the one season in St Louis. I think he's a legit bust, and wherever he goes next year will be more of the same. I don't think he's capable of playing a different game, and he's too much of a liability to get the role he would need to try and develop into an NHL scoring winger.
Ideally, he ends up in the AHL for a season or two, but is he willing to do that? Maybe it was all doomed regardless, but Edmonton did not do him any favors with his development.