Not easy to choose, because pretty much no one has been flawless or even consistent enough to have a clear winner like most of the previous years.
Voted for Pulisic, but I mostly did it because of the Hazardesque vibe he gives with his contribution in the final third. That being said I haven't forgotten his slow start of the season. You could just as easily give the award to either Mount or Kovacic using different arguments, but I'm the type of person who picks flashy over consistent most of the time, so...