Not to be a Debbie Downer, but with the 'potential' of a Cat 5 hitting FL, and having to make a decision now instead of later in the week, I would personally be heading away, not to, Orlando. Mother nature can change quickly, true, but most 'all' models are showing straight up FL.
Disney is great doing whatever they can, but they definitely don't have a bubble to keep damage from storms away (they deal great with minor storms/damages which most are counting on). Disney has not ever taken a real bad hit, but not immune.
That's something we are thinking now at home.
We should be arriving on Sept 9th and can make arragements if we need to reschedule flight to 11th or 12th.
But what would we find on Disney Property if the hurricane hits there? I don't know if it hits hard WDW will be just ready for the next day after the storm.