The content adjustment in question is related to mob changes in Corrupted Dungeons; specifically, both Demonic Harbingers and Bewildered Heretic Brawlers have been hit with the nerf baton, tuning down damage and cooldown times for certain attacks. As for items, there have been some changes to Frost Staffs, Holy Staffs, cloth helmets, and Quarrier Boots, all once again falling on the nerfing scale with increases to ability cooldown times. AoE escalation has also been dialed down as well, with an overall reduction in the percentage of damage done to multiple targets up to eight.
Content retrieved from: https://massivelyop.com/2020/11/16/albion-online-tweaks-corrupted-dungeon-mobs-and-balances-item-skills-in-its-latest-update/.