Matthew, as a category 4 hurricane scraping the Florida coast. I'm not sure how you think Irma is going to be so much worse than this, from a Disney World perspective. It's either going to make landfall in south Florida and come up the peninsula, and be a much weaker storm by the time it arrives in Orlando (and even then, Disney World is likely to be west of the worst weather). Or, it will remain offshore as a monster, but far enough away that impacts will be similar to Matthew.
When it stays a category 5 offshore and then makes a hard left turn at Melbourne, let me know.
It's good to be prepared for the worst. But this is not going to be apocalyptic for Orlando. Miami? West Palm Beach? Sure, that's possible. And god bless those of you in its direct path near the coast.