Yes, concourse A will be completely few months in 2008 after some several airlines will move back into concourse A. BA will kept own lounge in concourse A. I have notice that mean concourse A is simply problems years ago. It was being built new concourse A years ago. There is something wrong at concourse A some damaged during construction new North terminal before opened in 2010.
Otherwise some several airlines will moved back into concourse A instead G/F. I'm surely if someone will gets more specific information from MIA.