Assuming for a moment that FFG was willing to dip into Legends for an entire faction, how would you make the Vong different from the other terrible, ruthless factions in the game?
I could definitely see their ships working a little differently, given that their shielding tech is entirely different to everyone else's. Maybe an action that links to or from all of their other actions, that gives them something like a reinforce token (call it a Void token, and maybe it only covers a quadrant instead of half the ship?) that cancels crits first and can reduce damage to zero, but their ships have slightly lower health due to the lack of shields. I could see an I5 with "before you engage, gain a Void token," which would also serve to give an interesting decision about who gets First Player...
I'd give the faction a talent like Ruthless, if that didn't already exist. Perhaps, instead, a Glorious talent that triggers when they kill a ship?