I think that a team of very talented editors should make a HUGE Nar Shadda Level. It should be very large, and remind people of the JK1 level in SP and the MP one too. The most important aspect by far would that the level would have to have a extreme feeling of Vertigo, after all... its called the vertical city
Streets of Nar Shadda is ok, but it just dosent seem that high up.
Also, with more of a city like feel then the ones in JK2. Houses, people walking around, stores (just for atmosphere), etc. That would be great.
sadly it would rip peoples' framerate heads off
but I had been thinking about this for a while
what would help the 'crowded' feel would be:
lots of crisscrossing catwalks
elevators on the sides of buildings
airspeeders caught in traffic directly above and below you
animated textures of moving airspeeders further above and below those layers
gradual slanting of the walls in towards the center to give a false feeling of distance (to create vertigo ;)