Huge improvement! The overgrowth makes it seem more like an abandoned civilization. You can dirty things up a bit more in post with some grunge brushes, like the trash cans, cars and bus stop and add some depth with subtle environment fog. Sponge and dodge some objects to make them appear sun bleached etc, little things like that add up. Have you experimented with lower viewing and light angles? Would be interesting I think. Anyway, looking tons better, keep going!