The 7th Edition Horus Heresy FAQ is here!
And you can download it here:
A few highlights that have caught gamer's attention:
Chain Fire (HH1 – page 191: Moritat; CAL – page 17: Moritat)
Add the following clause to the Chain Fire special rule:
Tyrant Siege Terminators (HH3 – page 252; ICL – page 82)
Tyrant Siege Terminators may fire their combi-bolters in addition to their cyclone launchers in the Shooting phase.
Night Lords Unique Rite of War: Terror Assault (HH2 – page 239; ICL – page 57)
Change the following effect:
turn of any mission on a D6 roll of 2+. Night Fighting imposed in this manner carries on to
the second game turn on a roll of 4+, and on to the third turn on a roll of a 6. While Night
Fighting is in effect, all models with the Legiones Astartes (Night Lords) special rule gain +1
Initiative and +1" to their Run distances.