Well, perhaps you haven't heard about it yet, but starting with the April schedule, something's finally being done about the arrival issue. AA has been testing a new way of staggering arrivals and departures in STL since November, and arrival holds virtually disappeared. With the new method of scheduling, bag mishandlings are down, and departure delays have shrunk as well.
Wasn't that suppose to happen with the depeaking. At first they sent arrivals to the on a first come first serve basis to gates that could handle that type of plane. It worked great for awhile with barely a wait time. Now were back to the old way of waiting for your assigned gate you had prior to landing. Even with the new terminal, 15-20 minutes is about an average wait time and I've seen over an hour on a clear day with open gates surrounding the gate they are waiting for. And BTW...we are using all the gates that were shutdown just a few months ago.