Exactly this. We knew he was going to try to either save her or make a redemption arc for her with almost complete certainly after Nathanos' short story dropped. His infatuation with the character was made clear in "Dark Mirror" and there was no way he would write an ending for the events that started in BfA in a way that would see her defeated and punished; she was allowed to just... fly away. Villainous Sylvanas is something I appreciated in terms of her ability to drive a controversial plot, but also something that had to have its end by now.