His rate of turnovers is a massive issue and concern; being expansive and getting it right once in a while is not better than playing within your ability and keeping your side in possession; he cannot be a better passer than someone who does the latter.I think his play style is very similar to kante, but he doesn't have the same physicality and deicsion making as Kante. He's probably a better passer as well.
He's rightly got some stick for the howlers he can sometimes do, at vulnerable parts of the pitch. The man's got a superb mentality though, proper team player and determination in abundance.
He does some really good things, but his use of the ball - unforced errors in particular - need serious reining in.