I took a flight out of "C" (on AA) for this first time in a long time - Major renovations going on, A LOT of new windows let in a lot of natural light making it much brighter ^ and a Quiznos is under construction ^
Work has also begun on "D." United has completed their move to the "C" terminal, and all of their old gates are walled off and under construction. Midwest Connect will be operating in this newly renovated area when completed, I'm not sure if they will keep some operations at gate 52 as well
Work is progressing on the TSA check point to terminal "E." One downside of the work: Access to shorter lines for CO and NW Elite has diminished, expect slightly longer waits.