E-wings with R2-D2, especially decked out Corran's.
X-wings, especially Luke, were always annoying with R2-D2, but certainly beatable. Now you have a ship that has 1 more agility, 1 more green move, and 1 more shield to regen, plus the ability to take evade action, and it's just a nightmare.
Look no further than to all the Corran with R2-D2's in the TC tournament for proof. Has already cost me one game in the tourney. No lie, I think R2 got activated at least a half dozen times that game, that's ridiculous for 4 points.
Not sure how to fix it.. Perhaps a cap on how many times R2 can be activated in a game? Or maybe can only be used if you have no shields, meaning a ship could never regen it's full shields again?
