Well the thing is that a space map will always be a space map. In some situations you really can't avoid having people having to jump in a fightercraft. For some space maps with capital ship combat, though, the more ground-combat oriented people can board each others' ships of course.
As far as a Death Star map, it would definetly be possible to have some sections of the map be self-contained decks of the space station. I wouldn't really want to see combat happening in thsoe, but you could definetly put the entry points to turrets, hangers, or battlestation systems to repair inside there to give people something to run around and tend to.
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