From the preview:
The galaxy's Scum and Villainy are a motley assortment of merchants, smugglers, bounty hunters, thugs, and crime lords. They're almost all selfish criminals. And in X-Wing™, they've long flown to battle against Imperial and Rebel fighters whenever they felt the need to protect their turf or their investments.
More than this, these Scum have always fought according to their own style. While the Imperials have swarmed their opponents with cheap and efficient TIE fighters and the Rebels have focused on teamwork and defense, the galaxy's Scum and Villainy have specialized in dirty tricks, illegal technology, and tactics bred of convenience.
It should be no surprise, then, that when the Scum faction goes Epic with the C-ROC Cruiser Expansion Pack, you'll find that the faction's first huge ship and its upgrades permit a whole range of dirty tricks and scummy tactics.