Very impressive build--I initially thought I was looking at a 1/35th scale diorama, not 1/72nd. I really like the composition of the diorama, but it is still awfully tidy. I just think it needs more medium and fine rubble. All the loose bricks and other fragments are rather large, and there needs to be a lot more medium sized and finely crumbled debris mixed in. The rubble also seems to stop very close to the house, when it really should be all over the road. You can smash a real brick with a hammer and sprinkle the bits onto some thinned down white glue (PVA glue, which dries clear). The rubble should also include a lot of bits of metal pipe, paper, fabric, wiring, and stuff that simply cannot be identified. A nice detail would be to add some broken glass (or clear plastic, or even salt crystals, whatever you're using for glass) on the sill below the broken window, for instance.
Visit a demolition site, and you'll see what I mean. And smashed buildings also release a huge amount of dust, mostly pulverized mortar (cement), so consider brushing on some ground pastel chalks or light colored pigments to tone down the colors.
