It was a thrilling & sad epi. seeing her ending, but this was her perfect portrayal, I am happy for that.Shivji becoming manushya is when he will know about Sati's death he will react like a human, will be attached to her body, will not let it go following the Tandav nritya, affecting everyone in the world. To get him out of that state Vishnuji will cut Sati's body with his discus. Resulting in the 51 Shakti peethats wherever Sati's body part will fall. Then he will go in long penance. He will withdraw himself from the world leaving only Brhmaji & Vishnuji looking after the world, creating imbalance because Asuras will emerge fully powerful seeing him inactive.