Keith, I really hate the rating system. Whoever rated this as 'average' without explanation is an ass.
I agree that the focus (or the scan) is a bit soft, but I think you've done a wonderful job capturing a delightful perspective. It's perfectly balanced and vertical. I don't know how you prepped this for upload, but I'd recommend the USM on Photoshop to see if that won't help a little. The other suggestion I would make is to shoot this again on a bright but cloudy day so that you don't get the hotspots through the sunroof windows and on the upper left wall/balcony. The crop seems fine to me.