The good news for those travelers for whom Houston is a convenient drive-to port is that the city was slated to be without an NCL-based ship all summer (Norwegian Dream won't replace Norwegian Sea there until October). So the change in departure offers a bit more flexibility.
Norwegian Sea's additional voyages call at places like Cozumel; Roatan, the Bay Islands, Honduras; Cancun; and Belize City, Belize. Its Panama Canal journey, which essentially repositions the ship for its trip to Asia, will wind up in Los Angeles, with stops along the way at Cozumel, Cartagena, Columbia, Puntarenas, Costa Rica, Acapulco and Cabo San Lucas.
Norwegian Sea's transfer out of NCL's fleet is the next step in an overall goal for the company to remove all of its older, mid-sized ships. These will be replaced with splashy new-builds. NCL currently has five new ships under construction or on order.