Correct me if I'm wrong, but didn't Vader Crew rarely see later rounds in tournaments before this change? Plus, it seems to me people usually take vader to deal a crit to an arc-dodger, not tack on lots of damage consistently with attacks.
And don't forget the new damage deck. All crits will effect every ship, so that will definitely make Vader Crew more appealing even though the new large ship rule will bring him down a notch.