People that say he won’t kill characters he cares about: He has written two shows that have been wedged up against main film continuity. He has used characters from the main film continuity and is unable to kill them.
So, basically, the only characters he is free to kill is the ones he creates as the main characters of his stories. That’s depressing.
Ahsoka should really have died facing Vader. There was nothing left of Anakin, that burned away on Mustafar. She meant nothing to him, and unlike when Kylo says it- there is truth in that.