"DxOMark Sensor is composed of objective and repeatable measurements, but the way they are aggregated is arbitrary!"
We have indeed arbitrarily chosen to balance landscape (Dynamic Range), portrait (Color Sensitivity), and action photography (Low-Light ISO) equally as we attempt to answer the needs of typical photographers. Depending on your personal use of your camera, you may want to weight these measures differently. For the sake of simplicity, we chose the simplest possible combination as an average of all three use-cases.