From our two dozen or more trips, the last one being in 2013, I would have to say you're right. The Disney Marketing Machine has managed to overfill the MK with no thought at to how to handle that amount of people.
Our special needs adult son is in a wheelchair. Any time either before or after the fireworks made it impossible to even cross Main St., let alone navigate it up and down. He cannot see over everyone's head to view the castle and most adults cannot see him in the chair because it is below their level of vision. He's had multiple adults after the fireworks turn and fall over or onto him in their hurry to get out. They, then of course, start screaming at us even though he was sitting perfectly still. We never even think about leaving the park until 30 or 45 minutes after the fireworks and of course it's another 30 minute or more wait if you need the monorail.
Even during the day, the wait times for attractions of 2+ hours is too much for him to handle. Twelve hours in a park for just 5 or 6 attractions has the potential to bring on multiple seizures.
Unfortunately, the crowding situation at MK and now Toy Story Land, Avatar and eventually Star Wars Land will just bring in more and more people. I would like to see all the parks open until 11:00 or Midnight on a regular basis to spread out the crowds, but it seems hours are shrinking , the crowds get bigger and the value/enjoyment of money spent continues to go down.
Even with the crowds, we will definitely be going back sometime in the next year or two. It's hard to stay away for too long.
