I would fear too much for the fireworks, crowds thinned very quickly starting at 2-3 pm in every park every day. It was very noticeable. If people aren’t in the park, they aren’t spending money. How does Disney keep them in the park? Night shows, while I wouldn’t be surprised if OUAT or SWGS don’t come back, I’m certain each park will have a night show back soon, and I bet AK’s new one gets fast racked to open by fall of 2022. They are a proven way to keep people in the parks later.
Watching wait times, I've noticed that -- And it's a silver lining for many guests right now. The last 2 hours in the park seem to have very low wait times compared even to the early morning.
Difficulty finding dining reservations probably also contributes:
Your average guest shows up some time in the morning. Once they get tired or get finished with the rides on their agenda, why stick around? If they are day guests, they can go eat dinner off-site, and no reason to come back with no night entertainment.
On-site guests as well... once they start to get tired, what's the point of staying late at the park?
So seems to be some guests, those who are willing to first enter the park 2-3 hours before close, could really get a nice pleasant low-wait experience.
As an example... it's 4pm as I write this. Today Animal Kingdom closes at 7pm. So with 3 hours to go:
FOP still pretty bad at 60 minutes
Dinosaur 30 minutes
Expedition Everest only 15 minutes
Safari - 30 minutes, not horrible
Navi River -- 25 minutes
Check back in an hour, FOP will probably be under 45 minutes.
At DHS, with 4 hours until close: Runaway Train and Smuggler's Run are both only 30 minutes, not terrible. TSM is only 25 minutes.