Corto

For example. I Hoth, I would have made the walker assault mode a little shorter as an initial stage, then another stage where you have hold back imperial troops until "critical" personnel is evacuated, then escort Leia, Han, Chewie, R2D2 and C3PO to the Falcon an guarantee their escape.

Another example, using the battle of Endor. The first stage would be to steal information about the location and status of the second death star and escape on an imperial shuttle. A second stage where you actually have to fight to bring down the shield generator base. A final stage where you fight your way into the Death Star and blow the generator.

The main difference between my examples and the actual game modes is the change of setting, objectives and pace of the game. Versus a slight variation of a walker assault mode.