[img=http://img183.imageshack.us/img183/5779/1cfcd15f859065936f4eedbu.png]
http://img183.imageshack.us/img183/5779/1cfcd15f859065936f4eedbu.png
From what I've seen, the Vader dining room scene was set on about the same level as the roof lobby/apartment-whatever Han and Leia were staying in, notice those elevators in the still above on Leia's building on the left don't seem to even go to the top level. But yet we see one going up (SE) just before they enter the dining room.
Maybe the scale of the building can be changed to seem larger in comparison to the people? If that's the case I would not be having Cloud Cars fly close by because that messes up the scale and makes the building seem smaller, or I would either keep the cloud cars further away or make them smaller. And don't get me started on all those round windows in and just outside the dining room Where the heck are those from the outside of the building shown in the above still? I wouldn't want the new cloud city fly throughs cut out, because they add to the enviroment.
I realize it's going to be hard or impossible to get all the geography perfect, but just because we can't get perfect doesn't mean we can't make it better!