As you might have guessed I'm hugely into analytics, if you look at McNeil's numbers last year he actually ranked very highly in numerous categories - chances created, big chances created (ones which should lead to a goal) etc.
In part our woeful finishing made his season statistically look way poorer than it was. Still finished with 6 assists, but if our finishing would have been say average, those numbers would have been way into double figures.
Harrison I feel was just playing all season trying to catch-up from missing the entire end of last session and the full pre season.
In short though, Harrison fully fit after a ore season will be improved significantly, McNeil is not a problem in terms of what he provides for others certainly