Coruscant is one big city in the prequels, but as this is an edit to make RotJ more in line with Episodes 4 and 5, then I have no need to listen to the prequels :) Also cities often have water features.

As for creating new shots such as a distant shot of the city before moving across that shot, I could do, to be honest I hadn't thought about it because if I decide to then it wont really be that hard, not compared to things like solving the wookiee problems and the ending, and making the script work with some of the altered scenes.

Even if I manage to do all of those things I think it would still take ages to actually smooth it out with all the soundtrack and hope that the story was still explained enough to be ejoyable. Oh well, we'll see.