The 2 hits on a 6 was deemed a mistake in reading the blurry image. It is 1 extra hit. Getting cumulative -3AP from turn 3 is pretty good on these new units with Astartes Chainswords. Although I agree, not mind blowing. They seem to have made most of the Chapter Tactics a lot more middling than they were before. Sallies and Iron Hands getting dialled back. I had previously stated that I would have liked GW to just give us Flesh Tearers an option of Chain Axes at the same +1S, -1AP for 1pt per model that Khorne Marines have. Gets us wounding Marine Equivalents on 2s. I don't hold out any hope for Primaris Sanguinary Guard yet, but I am pretty sure that these October releases will see us get access to those Death Company Assault Intercesor options we were promised in the WarhammerTV live, just like Deathwatch should get the Indomitus units and the rest of the Phobos ones they are missing.
Are you certain that's true? So far, the latest FAQ states that they can't stack their AP with the Assault Doctrine and the overview of the codex leak doesn't seem to change that...
Best quality i could find from the video. I read "On an unmodified wound roll of 6, improve the Armour Penetration characteristic of that attack by 1. This is cumulative with the bonus from the Assault Doctrine if it is active for your army".
While that's awesome, the FT tactic is still weak overall. Compare 2 additional (200% more) hits on a 6 that fists get, with the -1 AP (16% more failed saves) on a 6, which all marines get for free on T3 anyway. FT's should be a flat -1AP in combat.
Still, excited for the changes.