The thing is that they are looking at the traffic flow wrong. They should be using an industrial engineer or someone like that to analyze max flow through an area and then plan things accordingly. And by "things" i mean walkways, stores, showtimes, etc. they have been doing better at not scheduling shows near each other to start when another is letting out but there is still room for improvement.
Of course none of these changes can take into account the selfish people who think the world revolves around them... The ones who say go through the turnstiles and stop. Or the ones completely blocking huge sections of walkway forcing everyone else to funnel around them. You can't fix stupid... Believe me, I've tried. I have been known to pick people up and move them when they do this... It is funny when you see their face when a smaller girl picks them up
What is needed in many areas is a traffic monitor. Someone on site that works to keep traffic moving when they see certain areas back up. They had something like this a couple years ago in the hospitality house. They had 2 lanes and one of the cave guides was making sure traffic kept moving in and out of SDC. This would help immensely in other areas. I do believe some people are just so oblivious to their surroundings that they don't realize they are causing huge traffic flow problems. Someone to gently urge them to keep moving would do wonders