Thats not true.
went from “Can solo him with zero corruptions and never drop under 50%” to “getting absolutely demolished, only barely got to kill him after 10 wipes by using tank stuff”. Also ursoc is equally bad in Emerald nightmare M, and even freaking Nythendra, who i could destroy in under 30 seconds before prepatch is now much harder to kill because i hit for peddles of damage compared to 8.3. And do not tell me its because of corruption because thats not even remotely true, i scored those kills without a single corrupted piece for the prepatch to turn me into a wimp.