All airlines are stressed to the max. After years of pocketing huge profits, they have fallen on bad bad times, facing closure. The key for their survival is flight management, forecasting loads is a prime task. So, fewer flights, with last minute equipment changes are now normal, frustrating passengers. While weekday flights to MBJ are often cancelled, the weekend flights have been run with larger more efficient aircraft. (ie:B787-A330). This doe's not help with planning vacations but in these times nothing is normal. In the future you may see more cancellations and also see non stop flights turning into one or two stop flights. But hopefully next fall, returning to normal. There is hope!!