It would make sense for Jet2 to get Air Tanker to do Florida and the Caribbean, and then get more short haul aircraft in to replace the A330 on the short haul routes.
The core business remains in house with Jet2, which they are very good at, and the “experimental” Long haul is being done by an operator who has lots of experience in doing exactly that. The only fly in the ointment is Cuba
That’s what I would do anyway.