Ummm... why get rid of the bodies, they add realism to an otherwise completely unrealistic(in ways that star wars should even be realistic in) game. Last time I checked, clones and such cant ghost through other people so they might as well leave it. If your computer cant handle that, get out of the 80s.
I really don't think you have any idea exactly how taxing all that is on a computer. No game with this kind of scale leaves bodies around forever. Remember that SWBF2 isn't built with different sections of the map loaded at different times, but rather with the whole map loaded at once.