You're thinking about the way AAU runs basketball, which has never been the case for soccer. AAU is a cluster. Nothing like seeing 16 year olds playing as/with 8th graders. What a sh!t show.
Soccer was never officially grade year, the 7/1 cut off (the way it was before they moved to calendar year) was easier to approximate that way while keeping legitimate boundaries.
Summer tournaments would be a disaster in 2025. My guess is that they all go or none of them go.
Bear in mind that when they switched over last time, they announced it two years ahead and most clubs started new age group trainings, in addition to regular training, months ahead of their normal tryouts. If they make the call in November, that really doesn't allow any time to do that, except for the older groups.
Given that the seemingly universally acknowledged hurdle to this is the short term cluster, the smart play is to ease that pain if they go this route. What would they really lose by deferring implementation by a year?