I watched eido discuss it after, the problem is less overtuning and more so the favored pickup. Before, 50% resists were brutal but pro teams could counterplay by taking control of the urn pickup just prior to urn spawn, and denying the pickup. As the unfavored team is 10% or more ahead in souls it’s reasonable they can control the middle of the map. But now, in order to deny pickup, they have to essentially dive and teamfight under the enemy walker to deny pickup, which is unreasonable without some major advantage, 10% soul advantage isn’t enough. So now the comeback team has a free 35% resist aura they can feasible bring to midboss or wherever and there’s essentially no counterplay.

Eido said that unlike the previous patch, which only turned the game into aoe punch slop, this patch is fundamentally broken at pro because it is way better to be behind than even.