These fights need to be retuned on several levels. Enemies chain-aggro'ing is a very bad look, but there's also just the amount of time the Druid Grove and Goblin Camp fights take. NPCs take forever to calculate their turns and execute their actions.
Well, I guess there will be a lot of work ahead to AI calculation more "reactive", so to say.
It's almost a given at this time in development, even if they are mostly borrowing the core of it from DOS 2 (as I would imagine).