his lack of size could hurt him long term, he isn't a tank like Crosby. Last year he got away with stuff because players weren't going to nail him too hard given he was 18. This year, that isn't the case.He's 19 and has 121 NHL points. Leading his team in scoring for the second year in a row... with no talent around him at all.
He will still be an exceptional player, but might not match the "next McDavid" hype.