Just new this week, NW plans to start phase II on the WorldGateway in Detroit.
Thursday and Friday, there was newspaper articles and news reports about changes coming to Concourse B & C out at DTW. NW is studying how to change the operations of Concourse C which haven't exactly worked as well as planned for the regional ops. They mentioned how Concourse C will be rebuild or reconfigured to improve operations. Also, gates will be added onto Concourse B.
I agree, that Concourse C doesn't exactly work as well as it should. The waiting area is way too small for the number of passengers and there can also be a shortage of gate space at times. People don't understand how to use the waiting room doors and don't line up properly. Good thing changes are coming quickly to make this new place even better.