Flexible Bank Resource Trading
The Standard Rules requires that the 4 (or 3 with a port) resources traded be the same to receive 1 of your choice from the bank.
Option 1: Allow any mixture of resources to be traded at the standard rate.
Option 2: Allow any mixture of resources to be traded at the standard rate plus an additional resource.
Pirate & Bandit Expires
The Standard Rules state that the Pirate & Bandit stay in place until moved.
Option 1: Allow the Pirate & Bandit to expire after adversely affecting a player a number of times like 1, 2 or 3.
Option 2: Allow the Pirate & Bandit to be bribed to leave, by giving the desired Pirate or Bandit 2 or 3 resources and removing them from the board. This can be used with Option 1 as well.