Dave26

From a safety stand point it's still fine. In the unlikely event that another pod goes down and the ship limps home, oasis class ships can run on 1 pod. Sure itll be slow and will seriously impact the trip, but it limps home and you spend that time on an otherwise fully functioning amazing ship. It's not like its losing power/electricity. Every other element of the ship is still operational and you get to enjoy it as the ship heads home at 1/3 speed. And absolutely worst case, BOTH of the other pods go down and it's dead in the water, still not THAT bad. Again still a fully functional ship aside from propulsion. Plumbing and food venues still up and going, pool is still open, flow riders still flowing, bars still serving. And you enjoy the ship as you wait for tugboats to come drag it home. Remember, it may seem like you are out in the open ocean, but unless it's a trans Atlantic/Pacific then you are never really that far from land. 
TL:DR it's not a safety issue, just an enjoyment risk issue

From a safety stand point it's still fine. In the unlikely event that another pod goes down and the ship limps home, oasis class ships can run on 1 pod. Sure itll be slow and will seriously impact the trip, but it limps home and you spend that time on an otherwise fully functioning amazing ship. It's not like its losing power/electricity. Every other element of the ship is still operational and you get to enjoy it as the ship heads home at 1/3 speed. And absolutely worst case, BOTH of the other pods go down and it's dead in the water, still not THAT bad. Again still a fully functional ship aside from propulsion. Plumbing and food venues still up and going, pool is still open, flow riders still flowing, bars still serving. And you enjoy the ship as you wait for tugboats to come drag it home. Remember, it may seem like you are out in the open ocean, but unless it's a trans Atlantic/Pacific then you are never really that far from land. 
TL:DR it's not a safety issue, just an enjoyment risk issue