In my opinion, the space maps could have four classes: Pilot, Squadron Leader (see Canadiens' thread), Trooper and Officer. Pilots handle the flying of fighters; Troopers, sans fragmentation grenades, handle boarding; and Squadron Leaders and Officers, exclusive to Squad Leaders only, handle the command of pilots and troopers, respectively. At some point, the Troopers should be given some sort of spaceship trooper model so that they look like the ones in the movies (like the troopers defending Tantive IV in ANH).
In maps without boarding, such as Escape from Hoth and Taloraan (sp.?), should have Pilots and Squadron Leaders only, both of which carry only a hydrospanner and perhaps a pistol and knife for self-defense.
"One of the bitches actually gave birth while she was attacking, and her puppies joined in on the carnage."
--the awesomeness that is Boatmurdered.