Hi Rob,
I can live with the lack of background focus, but there are 2 or 3 'disfigurements' on the foreground (oof) tarmac surface that attract and hold my attention, so (if mine), I'd clone them out (would need to be careful where 'fill' was taken from to avoid tell-tale though).
Only other thing I wondered about was rotation/perspective correction, but it could be an optical illusion, or the reality of the architecture, messin' with my eyes.
Good shot, there are many subtle things that are right about it that I haven't mentioned.
HTH, Dave