Facts:
(1) The first ships the Rebels and Imperials got were packaged in the same package, thus forcing players who wanted to focus on a single faction to buy one ship of the opposing faction. Imperials for two ships, and Rebels only got one. Scum & Villainy's "Wanted" set starts with THREE ships to start with!
Advantage: S&V.
(2) Wave 1 consisted of 2 ships each for Rebels/Imperials. Wave 2 came out MONTHS later, featuring only two more ships for each faction. Scum & Villainy's "second wave" will be three ships, in ADDITION to their already potent arsenal of the Firespray, HWK, Y-Wing, and Z-95.
This is SEVEN ships, scheduled to be released at the same time, as opposed to the two for the other factions.
Advantage: S&V.
(3) Both Rebels and Imperials had to wait for the next wave to receive large base ships. But, hey, Scum & Villainy gets a large ship IN THEIR FIRST WAVE!!!
Advantage: S&V.
(4) Rebels have Droids. Imperials have Cloaking. Scum & Villainy has "the illicit upgrade." What is it? What does it do? How does it work? I HAVE NO IDEA!
Advantage: S&V
tl;dr: The Scum&Villainy faction is obviously the only faction FFG cares about anymore.
