Found a link to patch notes put together from the Korean release. They are found here: https://omnom.io/4-0-patch-notes/
Interesting to see they will be removing the Palace Cellar and Sharpwind mine dungeons with the update. Also a couple barter token items from dungeons are being removed and replaced by just abyssal crystals and shards. A lot of changes to the honour store as well.
Along with so much more...