You'll hear a lot of older Southwest guys say that acquiring AirTran is what ruined their airline... can't expect acquiring Spririt will be anymore of a popular move. Expect big issues integrating fleets (maybe they can sell the airbuses to jetBlue at a premium?) and seniority lists and even larger amounts of happy campers.

Spirit going to the dark and dirty destinations is in line with their fare saver business model... Many people will use them to visit family in their "old country"...