According to the official Bandai Namco patch notes , this update targeted specific technical issues:
: A newer high-yield spot for DLC players. Using high-AoE skills like Wave of Gold here can net millions of runes per hour due to high-density enemy clusters. Furnace Golem Baiting (Enir-Ilim) : elden ring shadow of the erdtree update v1 16rune top
Despite the bug fixes, the most efficient ways to earn runes in the Shadow of the Erdtree DLC and the base game have been preserved. : According to the official Bandai Namco patch notes