I've been trying to figure out some of the new stuff:
Assets seem to essentially be upgrades.
The new triggers with the number in a circle e.g. (3) I think mean that either the fireteam you're hitting or the team you're in has to have that many members. Not sure about that one.
Each leader has a "TA" value, I assume are tactics points/cards.
The card stat values are speed, defence, willpower and armour
Can't really figure out how wounds work or even if the game has them, is a unit just dead if you beat the armour value by how much you beat them in the duel + damage of the attack? Most things seem to have a set 1-3 damage with some being higher, nothing seems to be much greater than 5 in specific circumstances.