The humor issue is a big one for me - Disney World used to be funny, and a lot of that rested on the willingness to poke fun at the Disney corporation, albeit in relatively safe ways. Think back to Cranium Command or Robin Williams in Animation or David Letterman introducing the Sound show or… the Muppets. Some of that was the spirit of the self-referential, post-modern 90s (boy, do I miss that) but a lot is modern Disney’s drive to aim everything at a distracted 5-year-old.
I agree on Disney not being funny, but disagree on the cause; mocking themselves is a rubber stamp they still apply liberally. In Zoogether you have Nick rolling his eyes at the musical number (I hate that joke with a burning passion I cannot understate) and a meta comment about how Giselle can't sing because fo legal reasons. The Epcot preview center mocked the Otherworld Showcase concept (and I've been told the ride mocks old Epcot being destroyed but I can't find it and never went on). That stupid Incredicoaster intro mocks how dumb of an idea it is. I've heard painfully unfunny things about Deadpool over in Disneyland...
They're just not funny. Edit: I want to clarify that while I don't like self deprecating humor, in this context "they're not funny" means the people writing these jokes, not that kind of joke.
The thing is, these jokes aren't jokes so much as they're the equivilant of being self deprecating because of low self esteem. They're not there to make you laugh. They're there to preemptively mock something they think will get mocked so they can say "look, we get you!" and when you say "Wait...why isn't the singing character singing/this coaster concept is dumb/etc." someone can chime in to say "They acknowledge that in the show/ride!". Which isn't actually a refutation of the complaint, but for some ungodly reason we have decided creatives get a pass for making crap so long as they say "haha, yeah, I really made crap, didn't I?" at some point. Anyway, if your so called joke isn't there to make people laugh but instead just to exist as a barrier against criticism, why bother cooking up something actually funny when just saying it's dumb will work just as well and take less effort?
Then there's the oversaturation element; if your skipper makes a joke about gift shops in a trip that has otherwise been void of self deprecating, it's funny partially because it's unexpected and it lends itself to Jungle Cruise being off kilter. If you get jokes like that regularly, it loses a lot of its punch. Disney does these things in all their media now, not just the parks, it's expected and rote, practically white noise.
Modern creatives also have a deathly fear of being called cheesy, which doesn't play well with comedy. It cuts off funny ideas before they can grow, and leaves anything slightly out there (or just any form of wordplay) with the same rubber stamp mockery immediately after, ruining the joke. With something like Muppets a lot of it was still silly. Now you don't get the fun and the funny, just the cynicism, because the cynicism is less likely to be called goofy and god forbid someone thinks you made something goofy.
They're not funny, they're not in an enviorment conductive to being funny, and we as a society have been giving painfully unfunny jokes a pass.
I miss when I could go into Country Bears or the preshow for Dinosaur and wait for the moment where someone burst out laughing. It always happened.