From Square: “The Patch 5.41 notes include information on the fourth and final chapter of the Ishgardian Restoration, as well as various updates and additions.

Additional features will be implemented in future updates:

Updates to blue mage, Save the Queen: Blades of Gunnhildr, Resistance weapons, and Skysteel tools are scheduled to be released in Patch 5.45.”

Source: N4G PC FINAL FANTASY XIV Patch 5.41 Notes, The Lodestone