These days it is possible to try the new mid-chapter patch that will release by the end of April, and among the many changes, there are two really very interesting: the new animations that killers have when they break the walls, and the rework to Bill's face.
THE NEW BILL'S FACE
As you can see from this image made by ManicMalak (a user of reddit), the Bill's face in the PTB is different from that of the current version of the game:
