Although looking at the regs, even if Disney could get into the next tier, being limited to 500 people means they wouldn't open anyway.
Busch Gardens in Williamsburg was limited to 1000 in June (and still is limited to same), and made the decision to not open with those numbers for a "summer" season...it was only when they could do "events" (1st Brewing, 2nd Food and Wine, 3rd Halloween, and then finally Christmas) and when extra Covid unemployment ran out that they made the decision to open...and when they did, they split days into 4 hour sessions, with 2 on Fridays and Sundays, and 3 on Saturdays, to make the 1000 people capacity per session worthwhile (and they planned closures M-W, til the events proved popular enough to add sessions for those days). Now, they also did drop entry prices to about $50, which was about 1/2 off normal entrance...but then again, anyone in the know could usually find day prices at that cost. They also increased parking from $10 (the 1st event's parking price) to $25 as events took off. And they also used the events as a chance to get some AP people's passes restarted and running.
But, if they didn't want to keep a staff and the park from stagnating and rotting, they probably wouldn't have bothered getting creative for 1000 (which they turned into 2000-3000)...no way Disney would find it worth it for 500...