As I said, it is entirely possible that Disney knows more than they are letting on and they may be keeping that information close unless absolutely necessary, such as discouraging cancellations to ensure a certain amount of guests when reopening in case the date does have to change again for some reason. Which is why they likely aren't telling the CMs that work in the parks anything until they are sure.
And would explain why a CM in reservations would indeed know the date. Very much on a "need to know" basis.
I'm not keeping my hopes up, but also hope for the best!