To clarify on one of the leader options:
Player 1 picks a Civ. Civ Pick is posted publicly.
Player 2 gets to see the Civ pick and then picks a Civ. Also posted publicly. (etc)
After Civs are picked, Player 1 picks a leader. This is not posted or known by any other player. Other players follow the same route, except perhaps need to give a list of 3 leaders in case there's conflict.
Player 1 picks a Civ. Civ Pick is posted publicly.
Player 2 gets to see the Civ pick and then picks a Civ. Also posted publicly. (etc)
After Civs are picked, Player 1 picks a leader. This is not posted or known by any other player. Other players follow the same route, except perhaps need to give a list of 3 leaders in case there's conflict.