If folks are apprehensive about the lack of distancing, now might not be the time to visit a theme park unfortunately. They're going to start seating folks next to each other on rides again, seating closer for shows like tiki room, and add in the queue lines it's going to get difficult to be distant. Do whatever feels right for your family but even before these changes it was a risk. When we went to WDW last year distancing was nonexistent in many scenarios and that's when rules were still strict- it caught us off guard.
For anyone that's worried about their kiddos under 12, you can get KN95s in extra small sizes they work surprisingly well on older kids. My son wore one when we traveled last year and he didn't mind it. Or if you're worried about you, get a KN95 for yourself. They're really not that bad, I wore them a lot in the beginning of all this once they were easy to find. Or postpone, which sucks, but you gotta do what you're comfortable with.
I didn't find this change surprising considering the speed WDW has been moving the past month- Disney is ready to start bouncing back and they want to catch DL up quickly. I'm sure many CMs are relieved to not have to deal with mask enforcement anymore.