"Outdoor unmasking" would still be a huge step forward for summer visitors, who'd only have to mask up when they're indoors, in the air-conditioning! We're coming in August, and trying to breathe through a sweat-soaked mask outdoors was something I was dreading, although I was certainly willing to do it if that was required.
I definitely agree that WDW will be requiring masks [indoors or otherwise] longer than most other places. It's hard for them not to, when so much of their target demographic is in the one age group that can't get vaccinated yet.