Regulation 1.11 - Thursday 25th August
Detailed notes as found by the community can be found on the Dark Souls III Forum (individual notes pending release).
Official Patch Notes:
The length of the Hammer skill, Perseverance (reduce damage when activated), has been increased //note: the Japanese says "Large Hammer Category"
Delayed the movement cancel timing of certain medium shields upon guard break
Removed the ability to parry when using the skills Blind Spot (Corvian Greatknife, Handmaid’s dagger) and Dancer’s Grace (Dancer’s Enchanted Swords)
Adjusted the shield penetration properties of Harpe, Shotel, Crescent Moon Sword, Carthus Shotel, Man Serpent Hatchet and Darkdrift
Fixed a bug where sound effects did not play properly when using Lightning Spears in quick succession
The attack cancel timing for rapiers equipped in the left hand has been adjusted
Several balance issues have been adjusted
Flaws have been fixed to improve performance