I think McNeil has a fantastic left foot and has 5 and 6 assists in his last two seasons for Burnley.
The only player i think who is comparable for us is Digne.
My thinking would be that if you had Digne and McNeil on the left side then thats potentially alot of assists coming from that side of the pitch.
Where teams could block off one of them, they will find it difficult to stop both.
In addition, McNeil also seems good 'tactically' and defensively and seems to follow instructions set out by Dyche -- so would suit a Benitez team.
Finally, i wonder if he may also be able to also rotate with James centrally as he seems to have ability to drift + vision to pick players out.
Im hoping that if he comes in on the left we are still going to move on either Antony or Bailey for the right side. I wouldnt fancy Richarlison on the right.