So i guess Palp-Empire-Team are still on the rise once we see more players with EP(Lead), Vader, Shore, TFP and B2/Royal Guard because Palp-Lead not only is against rebells, it also works against jedi so you get a nice bonus once more players try jedi again at arena. Vader itself also gains an edge since you can't evade his attacks (nice upgrade on Culling Blade too) and with TFP and B2 you have some decent toons to get rid of any buffs.
What i like at the massiv Zeta boost around toons, a lot of players will try different configs so arena meta might be change or at least will not only be the plain stupid: Wedge+X