Hi again all, I have some information to feed back:
It is true that the base package has changed - that is, if you book tickets through Discovery Cove, you can add 2 or 3 visits to SeaWorld, Aquatica, Busch Gardens or Adventure Island for $40.00 or $60.00 plus tax per person. These tickets have to be used within a 7 day window (rather than the 14 window with the previous offer). They did say that they have lowered their pricing on the base package to accommodate this but it obviously does not compensate for numerous visits to the other parks.
Having said all of that, they did also state that the old package could be booked "in house" by contacting 407-370-1427. However, they did not say if that was temporary or permanent.
They also said that the packages available through ticket resellers (such as Virgin, Thomas Cook,
Undercover Tourist, etc.) would also still include the 14-day unlimited visits and that they are aware that international visitors, in particular, tend to have longer stays and rely on this package.
Long story, short - it seems like there is still a lot of uncertainty and it will be interesting to see how this plays out over the next while.
I would appreciate anyone reporting back with their own booking/visiting experiences over the next few months as it will likely be a while before I get to visit again myself, unfortunately!
I will try to update the main post to accommodate this change shortly.