Clever stuff, I wish I knew how to do that!
Would just comment that the straightening of the converging verticals on the first creates the optical illusion that the building is bigger at the top than the bottom. I have noticed this before, and assume that the effect is because the human eye actually sees perspective, and when it is removed it doesn't look right for some reason.
The very flat, uniform light is a shame. You could retrieve some sense of luminosity and depth by pulling the tones of some of the planes of the buildings down slightly. The skies might benefit from subtly more punch as well do you think?
All that apart though, good work!