The calculations behind the ramming mechanic have been revamped. The mass of both ships is now taken into account: a smaller ship ramming the player will now mostly bounce off but if the player get rammed by a larger ship that will hurt a great deal.
The tooltips for missile interceptors and engine disruptors now inform you of how much energy these modules use when activated.
The achievement "'tis but a scratch" now uses the ship's health, rather than the bridge's.