This is something I've wondered about for a while, then with the incident last week with the undetermined substance that shut down the ticket booths in the esplanade and the entrance to DL, it brought it back to mind... why isn't there more than one entrance/exit to the park? I suppose you could count the monorail as a second, but with it's recent history, the capacity isn't that great, so maybe it counts as .1 entrances. Even if you only had a second exit so you didn't have to deal with the additional man-power for bag checks and entry, it seems like it would help. Imagine an "exit-only" location back between Splash and Pooh that led to the Mickey and Friends parking structure. All those people leaving the park after Fantasmic wouldn't flood Adventureland and Main Street. Or how about an exit over by the Tomorrowland train station that fed an pedestrian overpass going Harbor to the eastside hotels?
If DCA had a second entrance/exit, maybe near the Pizza place in Paradise Pier that would be convenient for DLR hotel guests or a tram dropoff, it would make the whole entrance rebuild this year a lot easier than trying to shoehorn the only entrance next to Soarin.
So is it better for security? Less man-power? More merchandise sales by funneling all exiting folks past the stores on main street? Just seems weird that everything else, from movie theatres to sports stadiums, to your house has more than one entrance/exit, but not a place where millions of folks go every year. Hmmmm.