I think it is way too easy to project one's own biases onto someone else, and effectively put words/thoughts into their mouths. I think it takes a lot of work, and perhaps too much work in the context of a forum post, to really put one's self into the mind of someone else, and then live as that person for the 52 years that that person didn't actually live through, which is a necessary step to actually project what that person's opinions would be today.
I don't think he'd be upset about the cost of the place. The company was never a charity and a day at the park is less than 25% more expensive, adjusted for inflation, than it was when Disneyland opened. That's a fair premium for how much more popular the idea of theme parks and the Disney characters are. And the food was less expensive, and it was much lower quality food than is offered today. People were far less concerned about gluten and saturated fat and artificial preservatives and such 60 years ago.
And I don't think he'd be upset about quality. He'd recognize that the quality of the park is as high as it was in comparison to the competition as the park was when he was in charge.
And Walt would be a really bad leader and bad manager if he micro-managed every single creative decision his creative people make. Of course, he had a reputation for that. Early in the thread someone speculated that the company wouldn't exist. They probably meant because of financial reasons, but I could see it happening because Walt himself brought the the place down by failing to improve his own skills, and as a result alienating so many of the creative people.