Yes I was excited initially to hear about this perk, but honestly I think it's more of a throwaway thing for most guests. The split-stayers are the happiest, it's the best benefit to them.
They should have made it "1 water park day" during your resort stay for 2 nights or more. I'm guessing that would have cut too much into water park sales.
The other obstacle is the weather. Your arrival day only doesn't give you much latitude if the weather is too cold or rainy.
I think what people are missing, is while this is obviously less useful for people who stay in a WDW resort for their entire vacation, this encourages split-stays for people previously not planning to stay at a WDW vacation during their vacation.
If I’m going to Orlando for a week, say I spend 3 park days at Universal and plan to do Disney for a couple days. This encourages you to actually move resorts in the middle.
Additionally, if you were planning on going to Disney for a full week, this encourages guests staying off site to transfer hotels to Disney property in the middle of the week.
Obviously, this isn’t effecting 90% of rooms, but in terms of occupancy and bookings, they’re just trying to squeeze out another 10% or so of occupancy, so it doesn’t need to move the needle for everyone, just a smaller percentage.
Also encourages locals who have annual passes without water parks to make a staycation of it and book a night or two.
I definitely see travel agents using this to their advantage. Travel agents book huge volumes of Disney trips and increasing perceived value of their bookings helps them sell trips (and helps Disney by getting more total bookings) and I believe this will be an effective tool to help boost perceived value.
It’s a perk I would’ve used in 2023 had it existed. To me, it’s a great perk, especially considering a vastly superior water park experience (Volcano Bay) exists down the street. Incentivizes me to actually visit these parks.