This looks like a really interesting building. I bet when the sun shines on it the colors are bright and vibrant. I'm curious about the textured diamond shapes too. I don't think you can do much with the way the weather was, but I would love to see this with a little more contrast.
You are getting better at controlling your exposures!!. This is well exposed, maybe 1/3 f stop low, but it could be corrected with curves an levels. Too bad there were not interesting clouds in the sky. With that lens you could try a wider composition at 18mm to get some ground. Maybe you did but there were some ditracting elements you did not want to show.
Very interesting building and some great colors. You too (like me), chose an interesting POV for your architecture shot. Many folks don't like to be this close.