Patch 6.01 for Endwalker not only adds new quests, but also includes the much awaited Pandæmonium: Asphodelos raid instance that had not been included with the original expansion launch.
This of course includes new weapons, armor and achievements.
For those leveling new jobs, leveling xp from level 81 to level 90 dungeons has also been increased.
Avid collectors will also note that new triple triad cards and orchestrion rolls.
Need more information? See the full patch notes here on the Lodestone.