The pacing was terrible. It jumped from one point to another with not enough storytelling or perspective to help the viewer be drawn in. Seemed like it was in a huge rush to get to the fighting and destruction, while lacking real-world reactions from the actors. Everything was just accepted at face value, with little to no emotional strain. City's been totally obliterated by aliens? Meh. No big deal. Next scene, it's all totally back to business as usual.