While not new, I did catch something that I don't think has been pointed out before. In the ASE Basketball video, at around 2:37, you very breifly see a red light jumping around the screen. This turns out to be where the Widowmaker Turret on the ridge is aiming. While you can see this light in some other videos, those have all featured the player actually controlling the turret. This confirms that players will be able to tell that they're being targetted by an enemy Widowmaker. Considering that I've never seen anyone last more than a couple of seconds against a Widowmaker, this is kind of comforting.