Is it posted anywhere what the exact changes being made with the patch are?

For example, the notes read:

Items you can obtain from certain treasure chest will change.

Dungeons
Sastasha/The TamTara Deepcroft/Copperbell Mines/The Bowl of Embers/Halatali/The Thousand Maws of TotoRak/Haukke Manor/Brayflox's/Temple of Qarn/Cutter's Cry/The Stone Vigil/Dzemael Darkhold/The Aurum Vale/The Wanderer's Palace/Amdapor Keep
What was changed? Are some items now unobtainable? Are they dropping from different chests instead?