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The space doesn't look very deep, and it looks like the daylight sensor is between some large-ish windows, thus getting plenty of sky/sun access. Changes in orientation will have an impact, but the effect(s) will be smoothed out in the lighting load data. Also, what's your daylighting setpoint? If it's really high or low, the daylight dimming response will always (or never) change throughout the day, so there too you will not see a subtle load difference due to changes in orientation.

I recommend you look at the illuminance map data for a much clearer picture of the spatial daylight distribution. Unfortunately, DView does not actually allow you to look at that data (oops), but you could use an old copy of Results Viewer for this.