As a regular follower of the forum, I observe what those best at the game are upset (or happy, occasionally) about.
Right now it's Scum, where once it was Imps. As much as Rebels win, they don't seem to get as much grief. But anyway, I digress...
I think FFG's problem with Scum is that they believe that Scum pilots should have "personality". That is, that nigh all Bounty Hunters or the like, especially those on bounty hunter type ships, should have an EPT to reflect their individuality. That's why the Skurrg heavy bomber gets EPTs but the K wing and Punisher don't. Their pilots lack the flair of a Rogue...
Of course, it's opened up a sad environment where your king arc dodgers, Soontir and buddies, are absolutely out-trumped by Nym. Low PS Tie bombers and Y wings are humiliated by the generic Jumpmaster. And so on.
I haven't looked at all ships using percentages, but it seems to be a thing that FFG believes Scum are the EPT faction, and it's making unhealthy combos that push out the other two factions. In other words, it seems that Fluff > Balance.