They did just nerf the heals and raise the cost but it wasn’t done properly. The heals should have remained strong but the cost should have gone much higher. It’s a giant aoe with strong heals and it simply went from making people unkillable to making them nearly unkillable. You can’t have a strong aoe heal function as your panic button. Corrosive armor in DK is a panic button and that just gives you a small boost to get away or maybe finish someone off 1v1. The aoe healing ult of thicket is just too much to be a panic button.