It's hard to know if this high demand, crowded park issue is just a temporary result of the pandemic ending and people just excercising pent up demand to travel to Disney or not. I have heard that Sept has already seen a small slow down but that could be just seasonal.They aren't truly trying to lower demand - that's just lip service to the public. They know they are capitalizing on higher yield customers and pushing prices up because the market is willing to pay it. A drop in demand is just a happy byproduct.. because they are counting on higher margins and revenues anyway.
They are just for the first time showing their true MBA styles to the media and talking about it directly instead of hiding behind fluffy nebulous phrases. Basically, they are stepping out from behind the curtain and being aggressive about it.
I would guess that WDW saw a highly sucessfull summer profit season but I think they will want to monitor the next year closely to see if this high demand continues. If this high demand is not a fluke, I could see that being able to justify a 5th park down the road to meet that demand.
Remember....Disney has a MASSIVE cloud of debt over its head tody. Their #1 goal right now is to get that resolved over time. That debt hurts their ability to invest in new projects. Disney's wallet is empty and put a lot of stuff on their credit cards to pay for 20th Fox and to stay affloat.
Because of this, I dobt see them building anything expensive in the parks for 5 years. Its very possible that spending 70 BBBillion on Fox...could have been a GIANT mistake on Iger's part.