Too much wall and not enough window. If a large building (especially a widescraper) has a lot of glass coverage then the sheer amount of reflection can partially make up for the obstruction. Reflections can change dramatically from day to day and even throughout the same day. You're not seeing the sky directly but you're still seeing it, which is a lot better than nothing. For the location this building is not bad but it should have been better.
How long have you been a member here?