Wondering....If the taller tower is still a few years from starting construction, why isn't this thread referring to the tower that is under construction at 73 stories (not 84) ?
Well, the sky is pretty grey in this photo, so not sure what colour you would expect the reflection to be! Presume you meant the aforementioned aluminum mullions?
Don't think the glazing is the issue, but the metal screen over the glazing. It does seem to be inconsistent and deviations become readily apparent when the sun rays are directly aligned with the wall. Site arch should note this as a deficiency.