Disagree that four ship Rebels are dead... But there is certainly no easy road.
No easy button on the munitions alpha strike panel...
Edit: dang it. This time last year I was warning people to watch what the wished for on munitions. This was exactly what I was worried about. Hopefully the scene changes again soon. Thanks PGS for the reminder.
While U-Boats are a huge problem for 4 ship Rebels, they're just as screwed by Palp Aces. Your attacks do nothing to them.
Don't forget that rebel 4 ship in the regen variant won Worlds because the Stresshog gave it a tool to deal with Palpaces along with PS10 Poe. 4 Rebels ships can be teched to have an excellent Palpaces matchup.