The Final Fantasy XIV team has posted the working notes for the upcoming v1.19a patch. The team will be addressing several key features including the Battle system, adding a new Grand Company side quest, adjusting prices on some NPC vendor items, system adjustments and important bug fixes.
As always, the list is quite comprehensive and includes notes from the dev team. You can read the full list of the proposed changes for patch v1.19a on the Final Fantasy XIV forum.
Additionally, the team has also posted a new lore piece surrounding the All Saint's Wake event scheduled to run from October 18th through November 1st. You can read up on the event on the Final Fantasy XIV Lodestone.