In my last game, the rebel player commented that he had more leaders than cards that were useful at the start of the game. I have seen this when I have played as the rebels. It sometimes pushes me to use a card like "Incite rebellion" when there are not any great targets at that moment in time.
So I realized that what a Rebel can do is, go on a Rapid Mobilization mission. Then they draw four probe cards and look at them. They can then decide not to move their base and bury them on the bottom of the probe deck. If done early in the game, this will get you 3 or 4 locations that the Empire cannot draw as probe cards and rule out as locations for your base. It allows you to bluff those locations very effectively.
Now I haven't tried this, and it is very dependent on the game state and what else you have in your hand, but its an option when you have Reekan or Lando left and don't have a great play for them to make. Especially since nether are good at blocking missions.