Well they've already said that they're keeping park reservations for the foreseeable future. But in terms of being able to visit over a longer period of time than just 14 days...or more park days total than 10...
I wouldn't be surprised if the reservations didn't go away. It helps with park staffing and it allows them to limit discounts to low demand days. I'm sure you will also see more surcharges during high demand periods. It is much easier to operate the park if they can have a consistent number of guests in the park every day.