MCO can be a nightmare. We did NOT walk off, picked our bags up in the terminal, used Disney transfers and they got us to MCO by 9:15 am. We had our bag checked and our boarding pass in hand and in the security line by 9:30 am. Good Lord, we barely made a 12:35 pm flight, it was boarding by the time we cleared security.
So my word of caution is, getting off the SHIP is not the issue, the AIRPORT SECURITY is. Have people made a flight that early? Yes. But too many others have not. Skip the stress and just book a later flight, 1 pm or later, budget for a nice lunch at the airport. When ruin a relaxing vacation with travel stress?