Terminal 2 is not closed. It looks a bit dated (like it was built in the 70s well it was) but is efficient in serving its purpose. Overall a very easy airport to connect through everything is set up logically. For originating and departing traffic you can get between parking and your gate quickly even at peak departure times. TSA does a much better job here than I've seen at other airports. It's a shame Delta is in the long slow process of de- hubbing it in favor of ATL and DTW but that was inevitable post Northwest merger considering the simple geography of CVG being between the two.