Yeah, the proposed phases say you only move onto the next phase if the current phase is manageable and there's no 'spiking.' Which means that if things do spike, you may have to retreat to a previous phase. The long awaited ramp up of testing and tracing could speed things up.
And by a phase being manageable... they implicitly mean an acceptable amounts of deaths. And that shouldn't surprise anyone. By letting 'essential workers' work, society has accepted their sacrifice for everyone else's safety and life, especially those who made the ultimate sacrifice. When this is over, they deserve a monument.
And once you pass the point where we're not overwhelming IC units and ventilators (which leads to hard choices of who gets saved and who doesn't), it's only then you start thinking about the consequences of a shut-down economy. Because a shut-down economy forces a another life-and-death choice: The prospect of a worldwide Great Depression II.
A GDII means there will be more deaths from hunger and a lack of healthcare than deaths from COVID. This would hit the poor in our wealthy countries and the poorer countries of the world particularly hard. A GDII could lead to other epidemics to spread again, like Ebola, and no resources left to contain it.
And so, the sacrificing continues. Those not in a high risk group need to start restarting the economy. The proposed Federal guidelines rightly gives different rules for those in the high risk group v. everyone else. The political question is how to aid those in the high risk group to follow the more stringent rules.
As far a WDW goes, if these Federal guidelines are followed (and at least the Governer of FL seems eager to follow Federal guidelines), then WDW wouldn't open until phase 3 (except for maybe Disney Springs and the hotels ahead of the parks).