A large chunk of the A330 capacity has been deployed on short-haul flying over the last two summers anyway, so the merger has left TCX in a position where it had more A330s than it probably needed. You do not need an expensive A330-200 lease to be providing seats to Dalaman.
The interesting thing about this will be whether the fleet reduction with A330s being returned will lead to lay-offs at the same time as a procession of operators of questionnable repute are being drafted in from Lithuania, Latvia and Spain to fly under TCX flight numbers to provide extra capacity. The selling of these services as Thomas Cook operations when they patently were not led to more than a few customer concerns this summer.