I think a neat fix (if you ever find a model for it) would be to add Cloud City as a sort of pseudo-planet. That way you can have the Death Star target Cloud City and destroy it, in the place of the planet itself. You can even change Bespin's Destroyed Galactic model to retain its appearance instead of turning into asteroids, so that way it doesn't look strange on the galactic side of things. All you'd need is a semi-decent Cloud City model for in-game. Everything else can be accomplished in the base.

Here's a neat trick i learnt from AotR community mapping. On Gas Giant space maps, they have a tiny, tiny moon (scale of like 0.1), and hide it in the map so that the GtS weapons & Death Star still functions.