I get the reasoning behind the "ticketed events." They're a business. They aren't in this to bring joy and innovate; that was Walt. He's long gone and, honestly, probably wouldn't have thrived in today's business world. He was the right person at the right time to shake things up and take chances.
Still, with that in mind, I do feel that things like closing the MK early for events like the Halloween party definitely detract from the experience that one used to get with general admission. For example, I haven't been able to go to WDW in over a decade. I adore the parks and will gladly go any chance I get. Life and finances always got in the way. As the resort has gotten more and more expensive, I had almost come to terms with the very real possibility that I would never be able to afford to go again. A few months ago, my wife, who has never been to WDW and, to be honest, could care less about ever going, surprised me with a trip that she was planning for us and our boys. She had been saving money and had finally found a time when we could get away and go. To say that I'm excited doesn't begin to describe how I feel. I almost cried when she told me. (Yes, it's silly, but I'm pretty sure that many on this board can relate.) When I looked at the dates of the trip, however, I noticed that the day when we would most likely be able to go to the MK was a MNSSHP day, so the park would close at 6pm. Normally, I wouldn't be upset. The only reason I'm a little perturbed is that, since we're only there for a couple of days, my wife is being understanding enough that we're putting aside some extra money to pay for tickets to the party so that we can maximize the short amount of time we have. As there are four of us, that's not cheap. I get it. My situation isn't universal. I only bring it up as an example of a ticketed event that definitely has a substantial impact on those of us not fortunate enough to be able to go to WDW on a regular basis. The increase in cost for a family of four compared to even the last time I went there in 2004 is enormous, not to mention the cost of my family going to WDW in 1983. (Yes, I know there are more parks there now, but we definitely never ran out of things to do at MK and EPCOT Center in 1983.) We have enough reminders every day of the huge gap in classes in our country. WDW used to be a place where the average family could go and have essentially the same experience as those who were more fortunate.
I know I'm venting. I just wanted to add my two cents.
tl,dr: It used to be, once you were in the parks, the general experience was the same for everyone. That is far from the case any longer.