Here is a brief overview of the Patch 2.28 content that was shown during the Letter from the Producer LIVE Part XIV. slated for release June 5th

The continuation of the Saga of the Zodiac
Adjustments to the behavior of pets while jumping
New objectives will be added to the Challenge Log
The introduction of the Sightseeing Log
New filtering and sorting options for the Expert Delivery user interface
Adjustments to PvP in the Wolves' Den
The ability to register for Good King Moggle Mog XII (Extreme) and Leviathan (Extreme) via the Duty Finder

The Echo will be applied to pets
Filtering options added to the Crafting Log
The ability to display the map from the Gathering Log
Durability will increase to 199% when repairing with a Disciple of the Hand class
Auto-sort of the party list when undertaking duties
The ability to participate in High-Level and Expert Duty Roulettes in a party
Adjustments made to the player commendation system
Equipment preview feature

Adjustments to the party finder
FATE progress will be displayed on the map
Teleporting via the Aetheryte icon on the map
Addition of text commands to clear the chat log
A list of text commands will be added
The ability to dismount via controller by pressing L1+R1 (LB+RB) at the same time
Titles will be displayed on a player's name plate
The ability to skip previously viewed cutscenes