I'm somewhat of a newcomer to Hyatt properties and gave them a bunch of business literally the day before this was announced (no, I didn't snag Diamond for free like a lot of people, they just have the best locations for these particular stays).
All the stays are fully refundable and I'm contemplating cancelling but as BillyBaloney has mentioned, it would help if they gave any information beyond 'insert corporate bs jargon here'. I'm considering cancelling purely on the basis of the contemptuous manner in which they're handling this but they've got the lack of availability in other properties on my list working in their favour right now.