Hello Neil and Gibbo,
Thank you for your comments, to be honest I started developing Adelaide a few years ago so the aerial image I licensed and the photos I collected from the airport represent the airport as it was a few years ago. I did became aware of the changes, however especially with the aerial image it's difficult to change.
That said... I'm happy to work on a small patch to add the new control tower for everyone once I find enough photos to work from
Hope that explains why