Don't most transport places like to their co-ordinate drop offs with pick ups? It sounds like like it might be more to do difficult now. It might also effect the cost since if they are going a drop off and a pick up, the cost of gas to either the port or the airport is being absorbed by passengers.
But if they have to make an extra trip for a pick up from port- and make a separate trip for a drop off to the port- after 11, it's going to burn more gas.
Also, it doesn't seem like those who drive to port will be effected.