This. My group was COMPLETELY confused when we started playing a co-op game and were attacking the same monsters and wasting movement and effort, getting in each others way, because we were acting at the same time!! We assumed our game was bugged and were looking to see if others had the same bug. Now we find out its INTENDED?
This makes absolutely NO sense. Not only is D&D a strict turn-based system, which Larian should have implemented, but Divinity 2 was a strict turn-based game. Why in the world would you not make BG3 also turn based??
They dont even need a toggle. It should just be turned based.