I think if you made the architectural lines vertical, that alone would improve the image.
At the moment the image looks quite cold and grey so it needs to be warmed up a bit IMO. You could also use a warm up filter or change the colour balance to warm the photo and skin tones.
I think the focus looks a little soft. You may need to sharpen the image to improve it. Always sharpen at the end of your workflow as this will affect the quality of the image. Any work done done after your main sharpening will degrade the quality.
Also, if you increased the contrast ( by using levels and curves in Photoshop )this would help to give the image more visual impact, as would increasing the saturation a little.
I hope this is helpful, kind regards, Alan.