It would be sweet to have a map where the empire is sieging a rebel astroid base and to have those being piloted in dropping off several AT-AT's and squads of players.
As for commander abilities I like the idea but not a death star weapon due to the incesent flash, death, respawn of it's firing. A cool idea to incorperate it though would be an episode 6 situation of a rebel fleet attacking it's back and the attempt to hold them off until the station could turn around while the fleet attacks and troops assult the core reactor, even turn it into a two part map set, after the failed/successful attack the rebels/imperials have to flee the system creating a big space battle.
Run Rebels if you can

I give my life for the Empire so that others my wipe the scurge of the Rebelion from the Universe.
!LONG LIVE THE EMPIRE!