I thought he looked a better player the last few games.
I agree with the comments before that 84% successful tackling doesn't take into effect amount of tackles attempted. One of my knocks on this kid earlier this season was he never got close enough to a ball carrier to get his focus down. I thought he harried his opponent much better as the season progressed. Hardly Nobby Stiles, but improvement, so I'm feeling better about him in this respect.
My other concern was the lack of positive passing. His passing statistics surprised me, and I'd like to see some additional stats (avg yds passed forward; defenders beaten with passes forward, etc). He is a young kid, who has shown capacity to improve on a big stage, but I saw a lot of passing the responsibility in the final third.
All told, I'm glad to have him on the team, but this remains a big hurdle for him.