I can't map (dont tell me how simple it is, i have no time to learn another "useless" thing), but i would have an idea.
Against all the ppl that tell me this game remembers them of Starcraft i think its more like Starship Troopers (if there are any older than 12 they will remember that movie).
So what i would suggest is a map that looks like the fortifiactions on that bug-planet in the movie.
The map would contain an small exterior courtyard and some interiors
IDK about the balance-issues but i feel it would fit in the gameplay and the atmosphere.
In any sort of an overal understanding that this is a bad idea, just ignore this thread.
Screenshot:
