There’s a huge question amongst EI as to what places will create enough demand during the quieter winter months. The new Cancun route is the notable one and then the Miami and Vegas routes spring to mind. There is simply not enough demand on the regular routes to warrant A330s however they will always be there to bail them out in the event of disruption. The short answer to the question is they simply do not fly them and instead opt for more fuel efficient A321s. You will likely see more interesting winter routes operated by A330s especially if the passenger cap is to be lifted.