Is Nucky really stepping down? That's a surprise. Something's gotta give. Ahhh, but there's a reason. I just haven't figured it out and/or missed it.
Just remember Arnold Rothstein's advice to Nucky.
God, this show is fucking awesome!!!!
Right. This is the "roll over and play dead while secretly digging your opponent's graves" maneuver perfected by the Corleones.

Notice that if Chalky calls a general strike the new regime's ability to make money will be severely curtailed. This is just a move on the chessboard by Nucky. And it's not the surrender that Jimmy thinks it is.
I would be surprised if Jimmy survives the season. It's being setup that he doesn't have the business sense or temperament to lead. And with the exception of Richard, he doesn't seem to exhibit/inspire loyalty that much either.
Speaking of money it looks like Van Alden has fallen off the morality wagon for good-unless this is all a setup. Maybe Bugeyes is playing his own game.